mysql：
drop table if exists address_book
sqlserver2005:
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N‘[dbo].[表名]‘) AND type in (N‘U‘))
DROP TABLE [dbo].[表名]
mysql：
drop table if exists address_book
sqlserver2005:
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N‘[dbo].[表名]‘) AND type in (N‘U‘))
DROP TABLE [dbo].[表名]
原文：https://www.cnblogs.com/KJXY/p/12397039.html