DELETE 刪除數據
DELETE FROM table_name
WHERE some_column=some_value;
- 注意: 在刪除語句中,要是沒有where條件語句,將刪除當前表中的所有數據。
刪除所有數據
可以在不刪除表的情況下,刪除表中所有的行。這意味着表結構、屬性、索引將保持不變:
DELETE FROM table_name;
或
DELETE * FROM table_name;
DELETE FROM table_name
WHERE some_column=some_value;
可以在不刪除表的情況下,刪除表中所有的行。這意味着表結構、屬性、索引將保持不變:
DELETE FROM table_name;
或
DELETE * FROM table_name;
Case具有兩種格式。簡單Case函數和Case搜索函數。 --簡單Case函數 CASE sex WHEN '1' THEN '男' WHEN '2' THEN '女' ELSE '其他' END
SELECT *FROM [TABLENAME]WHERE (ID IN (SELECT TOP [頁容量] ID FROM [TABLENAME] WHERE ID IN