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                            >[info]語句格式 

SELECT 顯示字段 FROM 表名1 WHERE 某字段= (SELECT ID FROM 表名2 WHERE 條件) 

>[info]SQL語句 

SELECT 姓名,單位,工資級別,工資標準 FROM 人員信息表 WHERE 工資標準=(SELECT 崗位工資 FROM 人員工資表 WHERE 崗位工資=3000) 

>[info]語句說明 

查詢人員工資表中工資標準=某條件的人員在人員信息表中的人員信息.只顯示部分字段. 

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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