Question

我在存储过程中有以下SQL代码：

CREATE PROCEDURE sp_createAColDiffTable (@table_name nvarchar(128))
AS

CREATE TABLE @table_name ( 

[table_name]       VARCHAR (128) NOT NULL,
[column_name]      VARCHAR (128) NULL,
[what_changed]     VARCHAR (128) NULL,
[sr_data_type]     VARCHAR (128) NOT NULL,
[tr_data_type]     VARCHAR (128) NOT NULL,
[sr_max_length]    SMALLINT NOT NULL,
[tr_max_length]    SMALLINT NOT NULL,
[sr_is_nullable]   CHAR NULL,
[tr_is_nullable]   CHAR NULL,
[sr_precision]     SMALLINT NULL,
[tr_precision]     SMALLINT NULL,
[sr_scale]         SMALLINT NULL,
[tr_scale]         SMALLINT NULL )
ON [PRIMARY]
WITH (DATA_COMPRESSION = NONE)

我像这样调用存储过程：

EXEC [sp_createAColDiffTable] 'hq193.dbo.arch_con_col_s193_s202'

当我运行代码时，我收到错误：

'@ table_name'附近的语法不正确。

当我替换@table_name的实际表名时，它可以正常工作。有人可以用我的语法指出问题吗？

Answer 1

您需要使用动态SQL，因为CREATE TABLE不采用变量名称。

e.g。

CREATE PROCEDURE sp_createAColDiffTable (@table_name nvarchar(128))
AS

DECLARE @sql nvarchar(MAX)

SET @sql = 'CREATE TABLE ' + @table_name + ' (    
[table_name]       VARCHAR (128) NOT NULL,
[column_name]      VARCHAR (128) NULL,
[what_changed]     VARCHAR (128) NULL,
[sr_data_type]     VARCHAR (128) NOT NULL,
[tr_data_type]     VARCHAR (128) NOT NULL,
[sr_max_length]    SMALLINT NOT NULL,
[tr_max_length]    SMALLINT NOT NULL,
[sr_is_nullable]   CHAR NULL,
[tr_is_nullable]   CHAR NULL,
[sr_precision]     SMALLINT NULL,
[tr_precision]     SMALLINT NULL,
[sr_scale]         SMALLINT NULL,
[tr_scale]         SMALLINT NULL )
ON [PRIMARY] WITH (DATA_COMPRESSION = NONE)';
EXEC(@sql);

请注意，使用动态SQL可能会导致SQL注入，因此请确保您永远不会将任何用户输入传递给@table_name。

Answer 2

声明表变量时使用

@table_name，而table_name或#table_name或##table_name用于创建表/临时表。

所以你会有

DECLARE @table TABLE (
    ID INT,
    ....

和

CREATE TABLE #table_name (
    ID INT,
    ....

如果您希望动态创建表，则必须使用动态sql。

要声明表变量，请查看DECLARE @local_variable (Transact-SQL)

要创建表/临时表，请查看CREATE TABLE (Transact-SQL)

除此之外，还可以查看The Curse and Blessings of Dynamic SQL

Answer 3

也许尝试CREATE TABLE [dbo].[' + @table_name + ']。

Answer 4

您应该使用sp_executesql，请参阅http://technet.microsoft.com/en-us/library/ms188001.aspx

Answer 5

You need to write here a dynamic query like this..
declare  @table_name  nvarchar(200)='table1'
declare @query nvarchar(4000)='
create table '+ @table_name +'(
[table_name]       VARCHAR (128) NOT NULL,
[column_name]      VARCHAR (128) NULL,
[what_changed]     VARCHAR (128) NULL,
[sr_data_type]     VARCHAR (128) NOT NULL,
[tr_data_type]     VARCHAR (128) NOT NULL,
[sr_max_length]    SMALLINT NOT NULL,
[tr_max_length]    SMALLINT NOT NULL,
[sr_is_nullable]   CHAR NULL,
[tr_is_nullable]   CHAR NULL,
[sr_precision]     SMALLINT NULL,
[tr_precision]     SMALLINT NULL,
[sr_scale]         SMALLINT NULL,
[tr_scale]         SMALLINT NULL )'
EXEC sp_executesql @query

exec('select * from '+@table_name)

Answer 6

您可以随时使用重命名存储过程，例如

CREATE PROCEDURE sp_createAColDiffTable 
(
    @table_name nvarchar(128)
 )
AS

CREATE TABLE TempTable
( 

    [table_name]       VARCHAR (128) NOT NULL,
    [column_name]      VARCHAR (128) NULL,
    [what_changed]     VARCHAR (128) NULL,
    [sr_data_type]     VARCHAR (128) NOT NULL,
    [tr_data_type]     VARCHAR (128) NOT NULL,
    [sr_max_length]    SMALLINT NOT NULL,
    [tr_max_length]    SMALLINT NOT NULL,
    [sr_is_nullable]   CHAR NULL,
    [tr_is_nullable]   CHAR NULL,
    [sr_precision]     SMALLINT NULL,
    [tr_precision]     SMALLINT NULL,
    [sr_scale]         SMALLINT NULL,
    [tr_scale]         SMALLINT NULL 
)

EXEC sp_rename 'TempTable', @table_name

使用存储过程中的参数值

6 个答案: