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                            # 字符型
char(m)  固定長度的字符串,如:郵編,手機號碼等,實際長度如果存值小于指定長度(m)會補0,  0~255

varchar(m)  可變長度的字符串,如果插入的數據長度不到會自動縮小,如:新聞標題,家庭住址.如果純中文(gbk,最多 65533/2個)(存utf8最多65533/3個)  0~65533必須設定長度

# 文本型

| tinytext | 0~255 | 小型文本 |
| --- | --- | --- | --- |
|Text |  0~1670萬 | 中型文本 |
| longtext | 0~42億  | 大型文本 |

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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