如何在 MySQL 中将数字添加到当前值(同时多次)?
mysqlmysqli database更新于 2023/12/6 2:20:00
您可以使用 UPDATE 命令来实现此目的。
语法如下
update yourTableName set yourColumnName =yourColumnName +yourIntegerValue where <yourCondition>;
为了理解上述语法，让我们创建一个表。创建表的查询如下
mysql> create table addANumberToCurrentValueDemo -> ( -> Game_Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Game_Score int -> ); Query OK, 0 rows affected (0.67 sec)
现在，您可以使用 insert 命令在表中插入一些记录。查询如下 −
mysql> insert into addANumberToCurrentValueDemo(Game_Score) values(1090); Query OK, 1 row affected (0.30 sec) mysql> insert into addANumberToCurrentValueDemo(Game_Score) values(204); Query OK, 1 row affected (0.12 sec) mysql> insert into addANumberToCurrentValueDemo(Game_Score) values(510); Query OK, 1 row affected (0.14 sec) mysql> insert into addANumberToCurrentValueDemo(Game_Score) values(7890); Query OK, 1 row affected (0.14 sec) mysql> insert into addANumberToCurrentValueDemo(Game_Score) values(8999); Query OK, 1 row affected (0.11 sec) mysql> insert into addANumberToCurrentValueDemo(Game_Score) values(1093859); Query OK, 1 row affected (0.11 sec) mysql> insert into addANumberToCurrentValueDemo(Game_Score) values(157596); Query OK, 1 row affected (0.11 sec) mysql> insert into addANumberToCurrentValueDemo(Game_Score) values(4857567); Query OK, 1 row affected (0.28 sec)
现在您可以使用 select 语句显示表中的所有记录。
查询如下 −
mysql> select *from addANumberToCurrentValueDemo;
以下是输出 −
+---------+------------+ | Game_Id | Game_Score | +---------+------------+ | 1 | 1090 | | 2 | 204 | | 3 | 510 | | 4 | 7890 | | 5 | 9290 | | 6 | 1093859 | | 7 | 157596 | | 8 | 4857567 | +---------+------------+ 8 rows in set (0.05 sec)
以下是在 MySQL 中将数字添加到当前值的查询
mysql> update addANumberToCurrentValueDemo set Game_Score=Game_Score+11 where Game_Id=5; Query OK, 1 row affected (0.15 sec) Rows matched: 1 Changed: 1 Warnings: 0
现在再次检查表记录以验证列 Game_Score 已从 8999 更新为 9010。
查询如下 −
mysql> select *from addANumberToCurrentValueDemo;
以下是输出 −
+---------+------------+ | Game_Id | Game_Score | +---------+------------+ | 1 | 1090 | | 2 | 204 | | 3 | 510 | | 4 | 7890 | | 5 | 9301 | | 6 | 1093859 | | 7 | 157596 | | 8 | 4857567 | +---------+------------+ 8 rows in set (0.00 sec)
