MySQL左填充用连字符分隔的零？
让我们首先创建一个表-
mysql> create table DemoTable829(SerialNumber int);
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable829 values(100); mysql> insert into DemoTable829 values(101); mysql> insert into DemoTable829 values(102); mysql> insert into DemoTable829 values(103); mysql> insert into DemoTable829 values(104);
使用select语句显示表中的所有记录-
mysql> select *from DemoTable829;
这将产生以下输出-
+--------------+ | SerialNumber | +--------------+ | 100 | | 101 | | 102 | | 103 | | 104 | +--------------+ 5 rows in set (0.00 sec)
以下是填充由连字符分隔的零的查询-
mysql> select RIGHT(CONCAT('000-', SerialNumber), 7) from DemoTable829;这将产生以下输出-
+----------------------------------------+
| RIGHT(CONCAT('000-', SerialNumber), 7) |
+----------------------------------------+
| 000-100 |
| 000-101 |
| 000-102 |
| 000-103 |
| 000-104 |
+----------------------------------------+
5 rows in set (0.00 sec)