sql-server - 如何检查表是否存在，如果不存在则创建表？

Question

我想编写代码来检查 SQL Server 2008 中是否存在表，如果不存在则创建它，然后将记录插入其中。请告诉我该怎么做？是否有必要为其创建存储过程？

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，则表示该表未退出

Answer 3

您需要查看系统视图来执行此操作：

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.';