delete from tablea & truncate table tablea的区别

delete from tablea & truncate table tablea的区别

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DELETE FROM S WHERE 年龄>60语句的功能是______。A、从S表中彻底删除年龄大于60岁的记录 B

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DELETE FROM S WHERE 年龄>60语句的功能是______。A、从S表中彻底删除年龄大于60岁的记录 B

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From the study by the Pew Research Centers Internet & American Life Project, we know t

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有SQL语句：SELECT * FROM 教师 WHERE NOT（工资>3000 OR 工资<2000)与如下语句等价的SQ

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有SQL语句： SELECT DISTINCT 系号 FROM 教师 WHERE 工资>=； ALL（SELECT 工资 FROM 教师

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使用SQL语句将学生表S中年龄（AGE）大于30岁的记录删除，正确的命令是A）DELETE FOR AGE>30

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