Sql Server Books

SQL Server Stored Procedures

This handbook shows how to write faster and more robust stored procedures and functions, learn effective, real-world solutions to problems faced by database developers, designers, and administrators, and master topics such as optimizing and debugging

SQL Server Stored Procedures Download Here

Microsoft SQL Server 2000 DTS Step by Step

This introduction to SQL server 2000 data transformation services (DTS) walks step-by-step through the procedures for building an extensible data movement application that periodically moves data from delimited text files.

Microsoft SQL Server 2000 DTS Step by Step Download Here

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sql the complete reference

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Finding the nth highest salary of an employee.

Finding the nth highest salary of an

employee.

CREATE TABLE Employee_Test
(
Emp_ID INT Identity,
Emp_name Varchar(100),
Emp_Sal Decimal (10,2)
)

INSERT INTO Employee_Test VALUES ('Anees',1000);
INSERT INTO Employee_Test VALUES ('Rick',1200);
INSERT INTO Employee_Test VALUES ('John',1100);
INSERT INTO Employee_Test VALUES ('Stephen',1300);
INSERT INTO Employee_Test VALUES ('Maria',1400);

--Highest Salary
select max(Emp_Sal) from Employee_Test

--3rd Highest Salary
select min(Emp_Sal) from Employee_Test where
Emp_Sal in
(select distinct top 3
 Emp_Sal from Employee_Test order by Emp_Sal desc)

--nth Highest Salary
select min(Emp_Sal) from Employee_Test
where Emp_Sal in
(select distinct top n Emp_Sal from
Employee_Test order by Emp_Sal desc)

Sql Transaction with stored procedure

create two table first and create stored procedure

create table emp(emp_id int , empname varchar(25));
create proc emp1
@emp_id int ,
@empname varchar(25)
as
begin
insert into emp values(@emp_id,@empname)
end

create table emp_detail (emp_id int ,city varchar(25));
create proc emp2
@emp_id int,
@city varchar(25)
as
begin
insert into emp_detail values (@emp_id,@city)
end

Then write this code
protected void Button1_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("data source=.;
initial catalog =abhishek;uid=sa; pwd=computer");
con.Open();
SqlTransaction st;
st = con.BeginTransaction("First");


SqlCommand cmd1 = new SqlCommand();
cmd1.Transaction = st;

try
{

cmd1.Parameters.Add("@emp_id", SqlDbType.Int).Value =
TextBox1.Text;
cmd1.Parameters.Add("@empname", SqlDbType.VarChar, 25).Value =
TextBox2.Text;
cmd1.CommandText = "emp1";
cmd1.CommandType = CommandType.StoredProcedure;
cmd1.Connection = con;

cmd1.ExecuteNonQuery();

cmd2 = new SqlCommand();
cmd2.Transaction = st;

cmd2.Parameters.Add("@emp_id", SqlDbType.Int).Value
= TextBox1.Text;
cmd2.Parameters.Add("@city", SqlDbType.VarChar, 25).Value
= TextBox3.Text;
cmd2.Connection = con;

cmd2.CommandText = "emp2";
cmd2.CommandType = CommandType.StoredProcedure;
cmd2.ExecuteNonQuery();
st.Commit();
}
catch(Exception ex)
{
st.Rollback();
Response.Write(ex.Message.ToString());
}
}

SQLSERVER .NET Integration Questions

What are steps to load a .NET code in SQL SERVER 2005?
How can we drop a assembly from SQL SERVER?
Are changes made to assembly updated automatically in database?
Why do we need to drop assembly for updating changes?
How to see assemblies loaded in SQL Server?
I want to see which files are linked with which assemblies?
Does .NET CLR and SQL SERVER run in different process?
Does .NET controls SQL SERVER or is it vice-versa?
Is SQLCLR configured by default?
How to configure CLR for SQL SERVER?
Is .NET feature loaded by default in SQL Server?
How does SQL Server control .NET run-time?
What’s a “SAND BOX” in SQL Server 2005?
What is a application domain?
How are .NET Appdomain allocated in SQL SERVER 2005?
What is Syntax for creating a new assembly in SQL Server 2005?
Do Assemblies loaded in database need actual .NET DLL?
Does SQL Server handle unmanaged resources?
What is Multi-tasking ?
What is Multi-threading ?
What is a Thread ?
Can we have multiple threads in one App domain ?
What is Non-preemptive threading?
What is pre-emptive threading?
Can you explain threading model in SQL Server?
How does .NET and SQL Server thread work?
How are exception in SQLCLR code handled?
Are all .NET libraries allowed in SQL Server?
What is “Hostprotectionattribute” in SQL Server 2005?
How many types of permission level are there for an assembly?
Can you name system tables for .NET assemblies?
Are two version of same assembly allowed in SQL Server?
How are changes made in assembly replicated?
Is it a good practice to drop a assembly for changes?
In one of the projects following steps where done, will it work?
What does Alter assembly with unchecked data signify?
How do I drop an assembly?
Can we creat SQLCLR using .NET framework 1.0?
While creating .NET UDF what checks should be done?
How do you define a function from the .NET assembly?
Can compare between T-SQL and SQLCLR ?
With respect to .NET is SQL SERVER case sensitive?
Does case sensitive rule apply for VB.NET?
Can nested classes be accessed in T-SQL?
Can we have SQLCLR procedure input as array?
Can object datatype be used in SQLCLR?
How’s precision handled for decimal datatypes in .NET?
How do we define INPUT and OUTPUT parameters in SQLCLR?
Is it good to use .NET datatypes in SQLCLR?
How to move values from SQL to .NET datatypes?
What is System.Data.SqlServer?
What is SQLContext?
Can you explain essential steps to deploy SQLCLR?
How do create function in SQL Server using .NET?
How do we create trigger using .NET?
How to create User Define Functions using .NET?
How to create User Defined Create aggregates using .NET?
What is Asynchronous support in ADO.NET?
What is MARS support in ADO.NET?
What is SQLbulkcopy object in ADO.NET ?
How to select range of rows using ADO.NET?

Sql server

1. What is normalization? - Well a relational database is basically composed of tables that contain related data. So the Process of organizing this data into tables is actually referred to as normalization.
2. What is a Stored Procedure? - Its nothing but a set of T-SQL statements combined to perform a single task of several tasks. Its basically like a Macro so when you invoke the Stored procedure, you actually run a set of statements.
3. Can you give an example of Stored Procedure? - sp_helpdb , sp_who2, sp_renamedb are a set of system defined stored procedures. We can also have user defined stored procedures which can be called in similar way.
4. What is a trigger? - Triggers are basically used to implement business rules. Triggers is also similar to stored procedures. The difference is that it can be activated when data is added or edited or deleted from a table in a database.
5. What is a view? - If we have several tables in a db and we want to view only specific columns from specific tables we can go for views. It would also suffice the needs of security some times allowing specfic users to see only specific columns based on the permission that we can configure on the view. Views also reduce the effort that is required for writing queries to access specific columns every time.
6. What is an Index? - When queries are run against a db, an index on that db basically helps in the way the data is sorted to process the query for faster and data retrievals are much faster when we have an index.
7. What are the types of indexes available with SQL Server? - There are basically two types of indexes that we use with the SQL Server. Clustered and the Non-Clustered.
8. What is the basic difference between clustered and a non-clustered index? - The difference is that, Clustered index is unique for any given table and we can have only one clustered index on a table. The leaf level of a clustered index is the actual data and the data is resorted in case of clustered index. Whereas in case of non-clustered index the leaf level is actually a pointer to the data in rows so we can have as many non-clustered indexes as we can on the db.
9. What are cursors? - Well cursors help us to do an operation on a set of data that we retreive by commands such as Select columns from table. For example : If we have duplicate records in a table we can remove it by declaring a cursor which would check the records during retreival one by one and remove rows which have duplicate values.
10. When do we use the UPDATE_STATISTICS command? - This command is basically used when we do a large processing of data. If we do a large amount of deletions any modification or Bulk Copy into the tables, we need to basically update the indexes to take these changes into account. UPDATE_STATISTICS updates the indexes on these tables accordingly.
11. Which TCP/IP port does SQL Server run on? - SQL Server runs on port 1433 but we can also change it for better security.
12. From where can you change the default port? - From the Network Utility TCP/IP properties –> Port number.both on client and the server.
13. Can you tell me the difference between DELETE & TRUNCATE commands? - Delete command removes the rows from a table based on the condition that we provide with a WHERE clause. Truncate will actually remove all the rows from a table and there will be no data in the table after we run the truncate command.
14. Can we use Truncate command on a table which is referenced by FOREIGN KEY? - No. We cannot use Truncate command on a table with Foreign Key because of referential integrity.
15. What is the use of DBCC commands? - DBCC stands for database consistency checker. We use these commands to check the consistency of the databases, i.e., maintenance, validation task and status checks.
16. Can you give me some DBCC command options?(Database consistency check) - DBCC CHECKDB - Ensures that tables in the db and the indexes are correctly linked.and DBCC CHECKALLOC - To check that all pages in a db are correctly allocated. DBCC SQLPERF - It gives report on current usage of transaction log in percentage. DBCC CHECKFILEGROUP - Checks all tables file group for any damage.
17. What command do we use to rename a db? - sp_renamedb ‘oldname’ , ‘newname’
18. Well sometimes sp_reanmedb may not work you know because if some one is using the db it will not accept this command so what do you think you can do in such cases? - In such cases we can first bring to db to single user using sp_dboptions and then we can rename that db and then we can rerun the sp_dboptions command to remove the single user mode.
19. What is the difference between a HAVING CLAUSE and a WHERE CLAUSE? - Having Clause is basically used only with the GROUP BY function in a query. WHERE Clause is applied to each row before they are part of the GROUP BY function in a query.
20. What do you mean by COLLATION? - Collation is basically the sort order. There are three types of sort order Dictionary case sensitive, Dictonary - case insensitive and Binary.
21. What is a Join in SQL Server? - Join actually puts data from two or more tables into a single result set.
22. Can you explain the types of Joins that we can have with Sql Server? - There are three types of joins: Inner Join, Outer Join, Cross Join
23. When do you use SQL Profiler? - SQL Profiler utility allows us to basically track connections to the SQL Server and also determine activities such as which SQL Scripts are running, failed jobs etc..
24. What is a Linked Server? - Linked Servers is a concept in SQL Server by which we can add other SQL Server to a Group and query both the SQL Server dbs using T-SQL Statements.
25. Can you link only other SQL Servers or any database servers such as Oracle? - We can link any server provided we have the OLE-DB provider from Microsoft to allow a link. For Oracle we have a OLE-DB provider for oracle that microsoft provides to add it as a linked server to the sql server group.
26. Which stored procedure will you be running to add a linked server? - sp_addlinkedserver, sp_addlinkedsrvlogin
27. What are the OS services that the SQL Server installation adds? - MS SQL SERVER SERVICE, SQL AGENT SERVICE, DTC (Distribution transac co-ordinator)
28. Can you explain the role of each service? - SQL SERVER - is for running the databases SQL AGENT - is for automation such as Jobs, DB Maintanance, Backups DTC - Is for linking and connecting to other SQL Servers
29. How do you troubleshoot SQL Server if its running very slow? - First check the processor and memory usage to see that processor is not above 80% utilization and memory not above 40-45% utilization then check the disk utilization using Performance Monitor, Secondly, use SQL Profiler to check for the users and current SQL activities and jobs running which might be a problem. Third would be to run UPDATE_STATISTICS command to update the indexes
30. Lets say due to N/W or Security issues client is not able to connect to server or vice versa. How do you troubleshoot? - First I will look to ensure that port settings are proper on server and client Network utility for connections. ODBC is properly configured at client end for connection ——Makepipe & readpipe are utilities to check for connection. Makepipe is run on Server and readpipe on client to check for any connection issues.
31. What are the authentication modes in SQL Server? - Windows mode and mixed mode (SQL & Windows).
32. Where do you think the users names and passwords will be stored in sql server? - They get stored in master db in the sysxlogins table.
33. What is log shipping? Can we do logshipping with SQL Server 7.0 - Logshipping is a new feature of SQL Server 2000. We should have two SQL Server - Enterprise Editions. From Enterprise Manager we can configure the logshipping. In logshipping the transactional log file from one server is automatically updated into the backup database on the other server. If one server fails, the other server will have the same db and we can use this as the DR (disaster recovery) plan.
34. Let us say the SQL Server crashed and you are rebuilding the databases including the master database what procedure to you follow? - For restoring the master db we have to stop the SQL Server first and then from command line we can type SQLSERVER .m which will basically bring it into the maintenance mode after which we can restore the master db.
35. Let us say master db itself has no backup. Now you have to rebuild the db so what kind of action do you take? - (I am not sure- but I think we have a command to do it).
36. What is BCP? When do we use it? - BulkCopy is a tool used to copy huge amount of data from tables and views. But it won’t copy the structures of the same.
37. What should we do to copy the tables, schema and views from one SQL Server to another? - We have to write some DTS packages for it.
38. What are the different types of joins and what dies each do?
39. What are the four main query statements?
40. What is a sub-query? When would you use one?
41. What is a NOLOCK?
42. What are three SQL keywords used to change or set someone’s permissions?
43. What is the difference between HAVING clause and the WHERE clause?
44. What is referential integrity? What are the advantages of it?
45. What is database normalization?
46. Which command using Query Analyzer will give you the version of SQL server and operating system?
47. Using query analyzer, name 3 ways you can get an accurate count of the number of records in a table?
48. What is the purpose of using COLLATE in a query?
49. What is a trigger?
50. What is one of the first things you would do to increase performance of a query? For example, a boss tells you that “a query that ran yesterday took 30 seconds, but today it takes 6 minutes”
51. What is an execution plan? When would you use it? How would you view the execution plan?
52. What is the STUFF function and how does it differ from the REPLACE function?
53. What does it mean to have quoted_identifier on? What are the implications of having it off?
54. What are the different types of replication? How are they used?
55. What is the difference between a local and a global variable?
56. What is the difference between a Local temporary table and a Global temporary table? How is each one used?
57. What are cursors? Name four types of cursors and when each one would be applied?
58. What is the purpose of UPDATE STATISTICS?
59. How do you use DBCC statements to monitor various aspects of a SQL server installation?
60. How do you load large data to the SQL server database?
61. How do you check the performance of a query and how do you optimize it?
62. How do SQL server 2000 and XML linked? Can XML be used to access data?
63. What is SQL server agent?
64. What is referential integrity and how is it achieved?
65. What is indexing?
66. What is normalization and what are the different forms of normalizations?
67. Difference between server.transfer and server.execute method?
68. What id de-normalization and when do you do it?
69. What is better - 2nd Normal form or 3rd normal form? Why?
70. Can we rewrite subqueries into simple select statements or with joins? Example?
71. What is a function? Give some example?
72. What is a stored procedure?
73. Difference between Function and Procedure-in general?
74. Difference between Function and Stored Procedure?
75. Can a stored procedure call another stored procedure. If yes what level and can it be controlled?
76. Can a stored procedure call itself(recursive). If yes what level and can it be controlled.?
77. How do you find the number of rows in a table?
78. Difference between Cluster and Non-cluster index?
79. What is a table called, if it does not have neither Cluster nor Non-cluster Index?
80. Explain DBMS, RDBMS?
81. Explain basic SQL queries with SELECT from where Order By, Group By-Having?
82. Explain the basic concepts of SQL server architecture?
83. Explain couple pf features of SQL server
84. Scalability, Availability, Integration with internet, etc.)?
85. Explain fundamentals of Data ware housing & OLAP?
86. Explain the new features of SQL server 2000?
87. How do we upgrade from SQL Server 6.5 to 7.0 and 7.0 to 2000?
88. What is data integrity? Explain constraints?
89. Explain some DBCC commands?
90. Explain sp_configure commands, set commands?
91. Explain what are db_options used for?
92. What is the basic functions for master, msdb, tempdb databases?
93. What is a job?
94. What are tasks?
95. What are primary keys and foreign keys?
96. How would you Update the rows which are divisible by 10, given a set of numbers in column?
97. If a stored procedure is taking a table data type, how it looks?
98. How m-m relationships are implemented?
99. How do you know which index a table is using?
100. How will oyu test the stored procedure taking two parameters namely first name and last name returning full name?
101. How do you find the error, how can you know the number of rows effected by last SQL statement?
102. How can you get @@error and @@rowcount at the same time?
103. What are sub-queries? Give example? In which case sub-queries are not feasible?
104. What are the type of joins? When do we use Outer and Self joins?
105. Which virtual table does a trigger use?
106. How do you measure the performance of a stored procedure?
107. Questions regarding Raiseerror?
108. Questions on identity?
109. If there is failure during updation of certain rows, what will be the state?

Orcale

Interview questions for Oracle database administrator

1. Differentiate between TRUNCATE and DELETE
2. What is the maximum buffer size that can be specified using the DBMS_OUTPUT.ENABLE function?
3. Can you use a commit statement within a database trigger?
4. What is an UTL_FILE.What are different procedures and functions associated with it?
5. Difference between database triggers and form triggers?
6. What is OCI. What are its uses?
7. What are ORACLE PRECOMPILERS?
8. What is syntax for dropping a procedure and a function? Are these operations possible?
9. Can a function take OUT parameters. If not why?
10. Can the default values be assigned to actual parameters?
11. What is difference between a formal and an actual parameter?
12. What are different modes of parameters used in functions and procedures?
13. Difference between procedure and function.
14. Can cursor variables be stored in PL/SQL tables.If yes how. If not why?
15. How do you pass cursor variables in PL/SQL?
16. How do you open and close a cursor variable.Why it is required?
17. What should be the return type for a cursor variable.Can we use a scalar data type as return type?
18. What is use of a cursor variable? How it is defined?
19. What WHERE CURRENT OF clause does in a cursor?
20. Difference between NO DATA FOUND and %NOTFOUND
21. What is a cursor for loop?
22. What are cursor attributes?
23. Difference between an implicit & an explicit cursor.
24. What is a cursor?
25. What is the purpose of a cluster?
26. How do you find the numbert of rows in a Table ?
27. Display the number value in Words?
28. What is a pseudo column. Give some examples?
29. How you will avoid your query from using indexes?
30. What is a OUTER JOIN?
31. Which is more faster - IN or EXISTS?
32. When do you use WHERE clause and when do you use HAVING clause?
33. There is a % sign in one field of a column. What will be the query to find it?
34. What is difference between SUBSTR and INSTR?
35. Which datatype is used for storing graphics and images?
36. What is difference between SQL and SQL*PLUS?
37. What is difference between UNIQUE and PRIMARY KEY constraints?
38. What is difference between Rename and Alias?
39. What are various joins used while writing SUBQUERIES?

Sqlserver Interview questions

What is RDBMS?
Relational Data Base Management Systems (RDBMS) are database management systems
that maintain data records and indices in tables. Relationships may be created and
maintained across and among the data and tables. In a relational database, relationships
between data items are expressed by means of tables. Interdependencies among these
tables are expressed by data values rather than by pointers. This allows a high degree of
data independence. An RDBMS has the capability to recombine the data items from
different files, providing powerful tools for data usage. (Read More Here)

What are the properties of the Relational tables?
Relational tables have six properties:
• Values are atomic.
• Column values are of the same kind.
• Each row is unique.
• The sequence of columns is insignificant.
• The sequence of rows is insignificant.
• Each column must have a unique name.

What is Normalization?
Database normalization is a data design and organization process applied to data structures
based on rules that help building relational databases. In relational database design, the
process of organizing data to minimize redundancy is called normalization. Normalization
usually involves dividing a database into two or more tables and defining relationships
between the tables. The objective is to isolate data so that additions, deletions, and
modifications of a field can be made in just one table and then propagated through the rest
of the database via the defined relationships.

What is De‐normalization?
De‐normalization is the process of attempting to optimize the performance of a database by
adding redundant data. It is sometimes necessary because current DBMSs implement the
relational model poorly. A true relational DBMS would allow for a fully normalized database
at the logical level, while providing physical storage of data that is tuned for high
performance. De‐normalization is a technique to move from higher to lower normal forms
of database modeling in order to speed up database access.

What are different normalization forms?

1NF: Eliminate Repeating Groups
Make a separate table for each set of related attributes, and give each table a primary key.
Each field contains at most one value from its attribute domain.

2NF: Eliminate Redundant Data
If an attribute depends on only part of a multi‐valued key, remove it to a separate table.

3NF: Eliminate Columns Not Dependent On Key
If attributes do not contribute to a description of the key, remove them to a separate table.
All attributes must be directly dependent on the primary key. (Read More Here)

BCNF: Boyce‐Codd Normal Form
If there are non‐trivial dependencies between candidate key attributes, separate them out
into distinct tables.

4NF: Isolate Independent Multiple Relationships
No table may contain two or more 1:n or n:m relationships that are not directly related.

5NF: Isolate Semantically Related Multiple Relationships
There may be practical constrains on information that justify separating logically related
many‐to‐many relationships.
ONF: Optimal Normal Form
A model limited to only simple (elemental) facts, as expressed in Object Role Model
notation.

DKNF: Domain‐Key Normal Form
A model free from all modification anomalies is said to be in DKNF.

Remember, these normalization guidelines are cumulative. For a database to be in 3NF, it
must first fulfill all the criteria of a 2NF and 1NF database.

What is Stored Procedure?
A stored procedure is a named group of SQL statements that have been previously created
and stored in the server database. Stored procedures accept input parameters so that a
single procedure can be used over the network by several clients using different input data.
And when the procedure is modified, all clients automatically get the new version. Stored
procedures reduce network traffic and improve performance. Stored procedures can be
used to help ensure the integrity of the database.
e.g. sp_helpdb, sp_renamedb, sp_depends etc.

What is Trigger?
A trigger is a SQL procedure that initiates an action when an event (INSERT, DELETE or
UPDATE) occurs. Triggers are stored in and managed by the DBMS. Triggers are used to
maintain the referential integrity of data by changing the data in a systematic fashion. A
trigger cannot be called or executed; DBMS automatically fires the trigger as a result of a
data modification to the associated table. Triggers can be viewed as similar to stored
procedures in that both consist of procedural logic that is stored at the database level.
Stored procedures, however, are not event‐drive and are not attached to a specific table as
triggers are. Stored procedures are explicitly executed by invoking a CALL to the procedure
while triggers are implicitly executed. In addition, triggers can also execute stored
procedures.

Nested Trigger: A trigger can also contain INSERT, UPDATE and DELETE logic within itself, so
when the trigger is fired because of data modification it can also cause another data
modification, thereby firing another trigger. A trigger that contains data modification logic
within itself is called a nested trigger.
What is View?
A simple view can be thought of as a subset of a table. It can be used for retrieving data, as
well as updating or deleting rows. Rows updated or deleted in the view are updated or
deleted in the table the view was created with. It should also be noted that as data in the
original table changes, so does data in the view, as views are the way to look at part of the
original table. The results of using a view are not permanently stored in the database. The
data accessed through a view is actually constructed using standard T‐SQL select command
and can come from one to many different base tables or even other views.

What is Index?
An index is a physical structure containing pointers to the data. Indices are created in an
existing table to locate rows more quickly and efficiently. It is possible to create an index on
one or more columns of a table, and each index is given a name. The users cannot see the
indexes; they are just used to speed up queries. Effective indexes are one of the best ways
to improve performance in a database application. A table scan happens when there is no
index available to help a query. In a table scan SQL Server examines every row in the table
to satisfy the query results. Table scans are sometimes unavoidable, but on large tables,
scans have a terrific impact on performance.

Finding the Date differance in Sql server Sp

create Procedure ap_Terms_List
-- return list of due days for the leasing
@dtsStartDate smalldatetime,
@dtsEndDate smalldatetime,
@chvLeaseFrequency varchar(20)
As
set nocount on

declare @insDueDates smallint -- number of intervals

-- calculate number of DueDates
select @insDueDates =
Case @chvLeaseFrequency
When 'monthly'
then DateDiff(month, @dtsStartDate, @dtsEndDate)
When 'semi-monthly'
then 2 * DateDiff(month, @dtsStartDate, @dtsEndDate)
When 'bi-weekly'
then DateDiff(week, @dtsStartDate, @dtsEndDate)/2
When 'weekly'
then DateDiff(week, @dtsStartDate, @dtsEndDate)
When 'quarterly'
then DateDiff(qq, @dtsStartDate, @dtsEndDate)
When 'yearly'
then DateDiff(y, @dtsStartDate, @dtsEndDate)
END

-- generate list of due dates using temporary table
Create table #DueDates (ID int)

while @insDueDates >= 0
begin
insert #DueDates (ID)
values (@insDueDates)

select @insDueDates = @insDueDates - 1
end

-- display list of Due dates
select ID+1, Convert(varchar,
Case
When @chvLeaseFrequency = 'monthly'
then DateAdd(month, ID, @dtsStartDate)
When @chvLeaseFrequency = 'semi-monthly'
and ID/2 = CAST(ID as float)/2
then DateAdd(month, ID/2, @dtsStartDate)
When @chvLeaseFrequency = 'semi-monthly'
and ID/2 <> CAST(ID as float)/2
then DateAdd(dd, 15,
DateAdd(month, ID/2, @dtsStartDate))
When @chvLeaseFrequency = 'bi-weekly'
then DateAdd(week, ID*2, @dtsStartDate)
When @chvLeaseFrequency = 'weekly'
then DateAdd(week, ID, @dtsStartDate)
When @chvLeaseFrequency = 'quarterly'
then DateAdd(qq, ID, @dtsStartDate)
When @chvLeaseFrequency = 'yearly'
then DateAdd(y, ID, @dtsStartDate)
END , 105) [Due date]
from #DueDates
order by ID

-- wash the dishes
drop table #DueDates

return