Question

我想在SQL Server 2008中编写代码以检查表是否已存在，如果不存在，则创建它然后将记录插入其中。请告诉我怎么做？是否有必要为它创建存储过程？

Answer 1

IF NOT EXISTS ( SELECT 1 FROM INFORMATION_SCHEMA.TABLES T
        WHERE T.TABLE_SCHEMA = 'dbo'
        AND T.TABLE_NAME = 'YOURTABLENAME'  )
    BEGIN

        CREATE TABLE dbo.YOURTABLENAME
        (
            ColumnDefinitionsHere
        )
    END

GO

Answer 2

(SELECT count(*) 
                 FROM INFORMATION_SCHEMA.TABLES 
                 WHERE TABLE_SCHEMA = 'TheSchema' 
                 AND  TABLE_NAME = 'TheTable')

如果count返回0表示该表未退出

Answer 3

您需要查看系统视图才能执行此操作：

IF  NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[SomeTable]') AND type in (N'U'))
BEGIN
    CREATE TABLE [dbo].[SomeTable](
        [SomeId] [int] NOT NULL
    )
END ELSE PRINT 'SomeTable already exists.';

如何检查表存在与否然后创建表如果不存在？

3 个答案: