UPDATE

UPDATE 语句用于修改指定表中的数据。

语法图

UpdateStmt:

UpdateStmt

TableRef:

TableRef

TableRefs:

TableRefs

AssignmentList:

AssignmentList

WhereClauseOptional:

WhereClauseOptional

示例

CREATE TABLE t1 (id INT NOT NULL PRIMARY KEY AUTO_INCREMENT, c1 INT NOT NULL);
Query OK, 0 rows affected (0.11 sec)
INSERT INTO t1 (c1) VALUES (1), (2), (3);
Query OK, 3 rows affected (0.02 sec) Records: 3 Duplicates: 0 Warnings: 0
SELECT * FROM t1;
+----+----+ | id | c1 | +----+----+ | 1 | 1 | | 2 | 2 | | 3 | 3 | +----+----+ 3 rows in set (0.00 sec)
UPDATE t1 SET c1=5 WHERE c1=3;
Query OK, 1 row affected (0.01 sec) Rows matched: 1 Changed: 1 Warnings: 0
SELECT * FROM t1;
+----+----+ | id | c1 | +----+----+ | 1 | 1 | | 2 | 2 | | 3 | 5 | +----+----+ 3 rows in set (0.00 sec)

MySQL 兼容性

UPDATE 语句与 MySQL 完全兼容。如发现任何兼容性差异,请在 GitHub 上提交 issue

另请参阅

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