如何在 MySQL 中更新一系列记录?
mysqlmysqli database
要在 MySQL 中更新一系列记录，您可以使用 BETWEEN。让我们首先创建一个表:
mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(20), Age int ); Query OK, 0 rows affected (0.53 sec)
下面是使用 insert 命令在表中插入一些记录的查询:
mysql> insert into DemoTable(Name,Age) values('Larry',23);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(Name,Age) values('Sam',24);
Query OK, 1 row affected (0.21 sec)
mysql> insert into DemoTable(Name,Age) values('Chris',21);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable(Name,Age) values('Carol',25);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable(Name,Age) values('David',22);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable(Name,Age) values('Robert',26);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable(Name,Age) values('John',20);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable(Name,Age) values('Mike',27);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(Name,Age) values('Johnny',28);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(Name,Age) values('James',23);
Query OK, 1 row affected (0.23 sec)
以下是使用 select 命令显示表中记录的查询:
mysql> select *from DemoTable;
这将产生以下输出:
+----+--------+------+ | Id | Name | Age | +----+--------+------+ | 1 | Larry | 23 | | 2 | Sam | 24 | | 3 | Chris | 21 | | 4 | Carol | 25 | | 5 | David | 22 | | 6 | Robert | 26 | | 7 | John | 20 | | 8 | Mike | 27 | | 9 | Johnny | 28 | | 10 | James | 23 | +----+--------+------+ 10 rows in set (0.00 sec)
以下是更新 MySQL 中一系列记录的查询。我们将 ID 范围从 5 到 10 的 Name 更新为 ‘Bob’:
mysql> update DemoTable set Name='Bob', Age=23 where Id between 5 AND 10; Query OK, 6 rows affected (0.25 sec) Rows matched: 6 Changed: 6 Warnings: 0
现在让我们显示所有记录，包括更新的记录:
mysql> select *from DemoTable;
这将产生以下输出 −
+----+-------+------+ | Id | Name | Age | +----+-------+------+ | 1 | Larry | 23 | | 2 | Sam | 24 | | 3 | Chris | 21 | | 4 | Carol | 25 | | 5 | Bob | 23 | | 6 | Bob | 23 | | 7 | Bob | 23 | | 8 | Bob | 23 | | 9 | Bob | 23 | | 10 | Bob | 23 | +----+-------+------+ 10 rows in set (0.00 sec)
