使用go in sql执行动态查询

Question

DECLARE @script VARCHAR(MAX);
SET @script = 
    '
    create table ali(id decimal(10,0));
    drop table ali;
    go
    create table ali(id decimal(10,0));
    drop table ali;
    '

EXEC (@script);

执行上述查询时出现错误消息.请告诉我你是否有解决这个问题的想法.

消息102,级别15,状态1,行4'go'附近的语法不正确.

注意:上面创建和删除创建表的代码只是例如,我有一些其他动态查询与go语句.请不要给出这个答案.

DECLARE @script   VARCHAR(MAX),
        @script1  VARCHAR(MAX);
SET @script = 
    '
    create table ali(id decimal(10,0));
    drop table ali;
    ';
SET @script1 = 
    '
    create table ali(id decimal(10,0));
    drop table ali;
    ';
EXEC (@script);
EXEC (@script1);

Answer 1

GO实际上是无效的T-SQL:

GO不是Transact-SQL语句; 它是sqlcmd和osql实用程序以及SQL Server Management Studio代码编辑器可识别的命令.

您必须删除GO动态SQL 中的实例,或使用本文中提到的工具之一(例如osql从命令行).您的查询仍应适用于GO从动态SQL 中删除的所有实例.

Answer 2

这是可能的,也很简单.

我想这里的每个人都挂了"GO"关键字.

解:

--Your Script modified by adding a single line of code:
DECLARE @script nVarChar(MAX);--I changed from VarChar to nVarChar - you should always use nVarChar for Dynamic SQL.
SET @script = 
    '
    create table ali(id decimal(10,0));
    drop table ali;
    go
    create table ali(id decimal(10,0));
    drop table ali;
    '
    --In case you have apostrophes in your script, you must escape them for the Exec() command. - 03/14/2013 - MCR.
SET @script = 'EXEC (''' + REPLACE(REPLACE(@script, '''', ''''''), 'GO', '''); EXEC(''') + ''');'--Just add this one line.
PRINT @script --See the command used (will be truncated in Select/Print, but not when Executing).
EXEC (@script);

对于那些寻找动态连接表中多个语句的解决方案的人:

--Example of compiling and chaining multiple DDL statments from data in a table:
-- DDL (Data Definition Language).
--  These are statements used to create, alter, or drop data structures.
--  They MUST be run in a single Batch.
--  The "GO" keyword is a SSMS syntax for splitting up batches - it is not an SQL keyword.
DECLARE @DDL_Statements TABLE
(
  DDL nVarChar(MAX)
)
INSERT INTO @DDL_Statements (DDL)
    SELECT 'create table ali(id decimal(10,0)); drop table ali;' UNION ALL
    SELECT 'create table ali(id decimal(10,0)); drop table ali;'
DECLARE @SqlCommand nVarChar(MAX) = ''
 SELECT @SqlCommand = @SqlCommand + 'EXEC(''' + REPLACE(DS.DDL, '''', '''''') + '''); '
   FROM @DDL_Statements as DS --In case you have apostrophes in your script, you must escape them for the Exec() command. - 03/14/2013 - MCR.
PRINT @SqlCommand --See the command used (will be truncated in Select/Print, but not when Executing).
EXEC (@SqlCommand)

Answer 3

您根本无法GO在动态T-SQL查询中使用,如@mellamokb所述.

由于您不想运行单独的SQL查询(如问题的第二部分所述),因此您可能会自行分开查询.

您可以使用UDF 拆分查询GO.拆分后,执行分离的批次.

但是,首先GO在其中创建一个字符串,然后在片刻之后将其分开,这感觉并不自然.