error in EXECUTE statment in sql server 2008

Question

0.00/5 (No votes)

See more:

Hy . I hope you are happy

I wrote yhis code in sql server 2008

SQL

ALTER PROC [dbo].[CreateDatabase]
(
	@DatabaseName NVARCHAR(MAX),
	@TableName NVARCHAR(MAX) = 'LogAlarm',
	@path NVARCHAR(MAX) = 'D:\BackupDatabase\'
)
AS
EXECUTE(N'
IF NOT EXISTS
(
SELECT * FROM sys.databases WHERE [name] = ''' + @DatabaseName + '''
 )
BEGIN
DECLARE @Query VARCHAR(MAX)
SET @Query = @Query + ''CREATE DATABASE '+@DatabaseName +' ON  PRIMARY ''
SET @Query = @Query + ''( NAME = '''''+@DatabaseName +''''', FILENAME = '''''+@path+@DatabaseName +'.mdf'''' )''
SELECT(@Query)
END
')

but @query is NULL .why ?

pleas help me .

Posted 28-Sep-12 23:55pm

khosro goudarzi

Updated 29-Sep-12 0:20am

Chris Maunder772.7K

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Chris Maunder · Answer 1 · 2012-09-29T00:23:00

Because you didn't initialise @Query.

Your

SQL

DECLARE @Query VARCHAR(MAX)

should be

SQL

DECLARE @Query VARCHAR(MAX) = ''

so:

SQL

ALTER PROC [dbo].[CreateDatabase]
(
	@DatabaseName NVARCHAR(MAX),
	@TableName NVARCHAR(MAX) = 'LogAlarm',
	@path NVARCHAR(MAX) = 'D:\BackupDatabase\'
)
AS
EXECUTE(N'
IF NOT EXISTS
(
SELECT * FROM sys.databases WHERE [name] = ''' + @DatabaseName + '''
 )
BEGIN
   DECLARE @Query VARCHAR(MAX) = '' -- <-- ADD THIS BIT
   SET @Query = @Query + ''CREATE DATABASE '+@DatabaseName +' ON  PRIMARY ''
   SET @Query = @Query + ''( NAME = '''''+@DatabaseName +''''', FILENAME = '''''+@path+@DatabaseName +'.mdf'''' )''
   SELECT(@Query)
END
')

Ahmed Mandur · Answer 2 · 2012-09-29T01:14:00

Hi,

Please Alter your Procedure with this

SQL

ALTER PROC [dbo].[CreateDatabase]
(
	@DatabaseName NVARCHAR(MAX),
	@TableName NVARCHAR(MAX) = 'LogAlarm',
	@path NVARCHAR(MAX) = 'D:\BackupDatabase\'
)
AS
BEGIN 

	DECLARE @Query NVARCHAR(MAX),
	@DBName Nvarchar(100),
	@LogName NVARCHAR(100),
	@LogFile NVARCHAR(100)
	
	
	SET @DBName = @DatabaseName+'.mdf'
	SET @LogName = @DatabaseName+'_log'
	SET @LogFile = @DatabaseName+'_log.ldf'
	
SET @Query = 
'
IF NOT EXISTS
(
SELECT * FROM sys.databases WHERE [name] = ''' + @DatabaseName + '''
 )
 
BEGIN

CREATE DATABASE [' + @DatabaseName +'] ON  PRIMARY ( NAME = N'''+ @DatabaseName + ''', FILENAME = N'''+@path+@DBName+''', SIZE = 3072KB , FILEGROWTH = 1024KB )
 LOG ON 
( NAME = N'''+ @LogName +''', FILENAME = N'''+@path+@LogFile+''' , SIZE = 1024KB , FILEGROWTH = 10%)

END'

EXEC (@Query);

END

Regards,
Ahmed Mandour

error in EXECUTE statment in sql server 2008

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0