ALTER NOCHECK CONSTRAINT附近的语法不正确-SQL Server 2008

Question

I am trying to disable a table's constraint with an ALTER statement using BCP commands. My code is as follows:

SET @disableConstraints = 'SQLCMD -E -S server-Name -d '+@databaseName+' -Q "EXEC sp_MSforeachtable @command1 = ALTER TABLE '+@schemaName+'.'+@tableName+' NOCHECK CONSTRAINT ALL;" >> Z:\Log\ErrorLog.txt'

However when I execute the xp_cmdshell command, the ErrorLog.txt will print an error saying:

Msg 156, Level 15, State 1, Server server-Name, Line 1
Incorrect syntax near the keyword 'ALTER'.

I've been fiddling around with single quotes and double quotes, but I am not getting anywhere.

Can someone help spot the syntax error?

Answer 1

您在更改之前错过了双引号

SET @disableConstraints = 'SQLCMD -E -S server-Name -d ' + @databaseName + ' -Q EXEC sp_MSforeachtable @command1 = "ALTER TABLE ' + @schemaName + '.' + @tableName + ' NOCHECK CONSTRAINT ALL;" >> Z:\Log\ErrorLog.txt'

Answer 2

In you cursor use only this query:

DECLARE @sql nvarchar(max);
DECLARE tables_cursor FOR...
OPEN tables_cursor;

WHILE @@FETCH_STATUS = 0
BEGIN
    PRINT QUOTENAME(@schemaName)+'.'+QUOTENAME(@tableName);
    set @sql = 'ALTER TABLE '+QUOTENAME(@schemaName)+'.'+QUOTENAME(@tableName)+' NOCHECK CONSTRAINT ALL;';
    EXEC sp_executesql @sql;

    FETCH NEXT FROM tables_cursor INTO @schemaName, @tableName;
END
CLOSE tables_cursor;
DEALLOCATE tables_cursor;

If all is executed on the same server and database, you don't need to use sqlcmd and connect to another server. Dynamic SQL with EXEC and sp_executesql will do it.

Answer 3

在ALTER的开头和ALL的结尾需要两个单引号

SET @disableConstraints = 'SQLCMD -E -S server-Name -d '+@databaseName+' -Q "EXEC sp_MSforeachtable @command1 = ''ALTER TABLE '+@schemaName+'.'+@tableName+' NOCHECK CONSTRAINT ALL'';" >> Z:\Log\ErrorLog.txt'