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>當我們遇到一些比較復雜的SQL語句，我們可能需要自定義執行

> 執行SQL（query($sql = '')）
> 參數為必選，傳入一個sql字符串，將返回對應的執行結果

 示例：

~~~
$Res = Db()->query("select * from `User` where `name` = '張三'");		//查詢name等于張三的相關數據

print_r($Res);
~~~


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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