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                            # 查詢SQL

查詢語句至少包含兩個部分：1.查什么；2.從哪兒查

SELECT子句負責查什么
FROM子句負責從哪兒查

*代表所有列

第一個簡單的查詢
~~~
SELECT *
FROM emp
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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