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                            >[info]語句格式 

SELECT <字段名1,字段名2,...> FROM <表名> WHERE <查詢條件> 

>[info]SQL語句 

SELECT 編號,姓名,性別,出生日期,年齡,工資級別 FROM 人員信息表 WHERE 年齡=50 

>[info]語句說明 

查詢"人員信息表"表中,年齡為50的記錄.其中只查詢:編號,姓名,性別,出生，年齡,工資級別六個字段 

注意:條件是 “年齡=50”.年齡字段是數值型不要加單引號.

練習一:請你自己在執行語句中把條件“年齡=50”中的"="號換成">"或"<"或">="或"<="或"<>"試試看結果如何.

練習二:再把條件“年齡=50”換成“NOT(年齡=50)”試試.看結果又如何.
 

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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