59 lines
1.2 KiB
Markdown
Executable File
59 lines
1.2 KiB
Markdown
Executable File
# 循环批量删除数据库表
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> SQL Server 批量删除指定条件的表
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## 存储过程
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```sql
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-- 创建临时表存储表名
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CREATE TABLE #Man (
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id INT IDENTITY(1,1),
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tbName NVARCHAR(50)
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)
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-- 插入要删除的表名（排除保留表）
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INSERT INTO #Man
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SELECT name
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FROM sys.tables
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WHERE create_date <= '2018-03-10 15:36:35.687'
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AND name NOT IN ('DeviceNetState', 'EphInfo', 'FilterStatistic', 'UserInfo', 'AlmInfo')
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ORDER BY create_date DESC
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-- 确认要删除的表
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SELECT * FROM #Man
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-- 开始删除
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DECLARE @i INT = 1
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DECLARE @count INT
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SELECT @count = COUNT(*) FROM #Man
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DECLARE @str NVARCHAR(500)
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DECLARE @tb NVARCHAR(50)
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WHILE (@i <= @count)
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BEGIN
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SELECT @tb = ISNULL(tbName, '') FROM #Man WHERE id = @i
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SET @str = 'DROP TABLE [' + @tb + ']'
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EXEC(@str)
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SET @i = @i + 1
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END
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-- 清理临时表
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DROP TABLE #Man
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```
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---
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## 安全建议
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1. **先 SELECT 确认**：删除前先只 SELECT，确认无误再执行 DELETE
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2. **排除保留表**：一定要排除系统表和重要业务表
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3. **备份**：生产环境先备份再执行
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4. **分批执行**：大量删除时分批进行，避免锁表时间过长
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---
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> ⚠️ **警告**：此操作不可逆，执行前务必确认！
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