數據庫之where子句以及函數

where子句 例： -- 查詢銷售人員或辦事人員並且工資大於 800 select * from emp WHERE (job='CLERK' OR job='SALESMAN') and sal >800 -- 查詢獎金介於1500-3000 select * from emp where sal between 1500 and 3000 select * from emp where sa

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