MySQL 查询更新所有记录以仅将首字母大写并将其余字母设置为小写
mysqlmysqli database更新于 2023/10/24 14:51:00
首先我们创建一个表 −
mysql> create table DemoTable2017 -> ( -> Name text -> ); Query OK, 0 rows affected (0.55 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable2017 values('JOHN SMITH,MYSQL');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable2017 values('DAVID MILLER,MONGODB');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable2017 values('CHRIS BROWN,JAVA');
Query OK, 1 row affected (0.11 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable2017;
这将产生以下输出 −
+----------------------+ | Name | +----------------------+ | JOHN SMITH,MYSQL | | DAVID MILLER,MONGODB | | CHRIS BROWN,JAVA | +----------------------+ 3 rows in set (0.00 sec)
以下查询仅将首字母设置为大写，其余字母设置为小写 −
mysql> update DemoTable2017 -> set Name=REPLACE(CONCAT(UPPER(LEFT(Name, 1)), LOWER(SUBSTRING(Name, 2))),' , ', ', '); Query OK, 3 rows affected (0.16 sec) Rows matched: 3 Changed: 3 Warnings: 0
让我们再次检查表记录 −
mysql> select *from DemoTable2017;
这将产生以下输出 −
+----------------------+ | Name | +----------------------+ | John smith,mysql | | David miller,mongodb | | Chris brown,java | +----------------------+ 3 rows in set (0.00 sec)
