mysql 刪除語句(delete)用于刪除表中的數據,格式為:delete from table_name where condition。1. 刪除所有數據:delete from table_name; 2. 刪除指定條件的數據:delete from table_name where column_name = value; 3. 刪除多個條件的數據:delete from table_name where column_name1 = value1 and/or column_name
MySQL 刪除語句:DELETE
DELETE 語句格式:
DELETE FROM table_name WHERE condition;
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語法解釋:
DELETE FROM table_name:指定要刪除數據的表名。
WHERE condition:指定刪除數據的條件,可選。如果省略,則刪除表中所有數據。
刪除所有數據:
DELETE FROM table_name;
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刪除指定條件的數據:
DELETE FROM table_name WHERE column_name = value;
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其中,column_name 是表中的列名,value 是要匹配的條件值。
刪除多個條件的數據:
DELETE FROM table_name WHERE column_name1 = value1 AND/OR column_name2 = value2;
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刪除 BETWEEN 范圍內的值:
DELETE FROM table_name WHERE column_name BETWEEN start_value AND end_value;
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刪除 IN 列表中的值:
DELETE FROM table_name WHERE column_name IN (value1, value2, ...);
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注意事項:
DELETE 語句是不可撤銷的,在執行之前請確保正確。
如果使用了 WHERE 條件,確保條件是正確的,否則可能刪除意外數據。
在刪除大量數據之前,請考慮使用備份或事務以確保數據安全。