清空数据库所有数据
USE [数据库名]
DECLARE @Table VARCHAR(100)
DECLARE myCursor CURSOR FOR SELECT t.name FROM sys.tables t
OPEN myCursor
FETCH NEXT FROM myCursor INTO @Table
WHILE @@FETCH_STATUS=0
BEGIN
EXEC(\'TRUNCATE TABLE \'+@Table+\'\')
FETCH NEXT FROM myCursor INTO @Table
END
CLOSE myCursor
DEALLOCATE myCursor
适用情况：数据库表之间没有什么约束
有约束的没有测试