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                            ### 3.3.4 從表中檢索數據

[`SELECT`](https://dev.mysql.com/doc/refman/8.0/en/select.html) 語句用于從表中提取信息. 語句的一般構成如下:

```sql
SELECT what_to_select
FROM which_table
WHERE conditions_to_satisfy;
```

*`what_to_select`* 表示要查看的內容. 這是列的列表, `*` 表示 “所有列”. *`which_table`* 表示要從中檢索數據的表. `WHERE` 子句是可選的. 如果存在, *`conditions_to_satisfy`* 指定一個或者多個條件, 檢索的數據必須滿足限制.
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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