MySQL实现replace函数的几种实用场景

mysql> select * from `LOL`;
+----+----------------+--------------+-------+
| id | hero_title   | hero_name  | price |
+----+----------------+--------------+-------+
| 1 | 刀锋之影    | 泰隆     | 6300 |
| 2 | 迅捷斥候    | 提莫     | 6300 |
| 3 | 光辉女郎AA   | 拉克丝    | 1350 |
| 4 | 发条A魔灵A   | 奥莉安娜   | 6300 |
| 5 | 至高之拳    | 李青     | 6300 |
| 6 | 无极剑圣    | 易      |  450 |
| 7 | 疾风剑豪    | 亚索     | 6300 |
+----+----------------+--------------+-------+
7 rows in set (0.00 sec)

SELECT REPLACE(hero_title,'之',' - ')as repl_title,hero_name,price from LOL;
mysql> SELECT REPLACE(hero_title,'之',' - ') as repl_title,hero_name,price from `LOL`;
+----------------+--------------+-------+
| repl_title   | hero_name  | price |
+----------------+--------------+-------+
| 刀锋 - 影   | 泰隆     | 6300 |
| 迅捷斥候    | 提莫     | 6300 |
| 光辉女郎AA   | 拉克丝    | 1350 |
| 发条A魔灵A   | 奥莉安娜   | 6300 |
| 至高 - 拳   | 李青     | 6300 |
| 无极剑圣    | 易      |  450 |
| 疾风剑豪    | 亚索     | 6300 |
+----------------+--------------+-------+
7 rows in set (0.00 sec)

mysql> UPDATE `LOL` SET hero_title=REPLACE(hero_title,'A','');
Query OK, 2 rows affected (0.05 sec)
Rows matched: 7 Changed: 2 Warnings: 0

-- 去掉后在查询：
+----+--------------+--------------+-------+
| id | hero_title  | hero_name  | price |
+----+--------------+--------------+-------+
| 1 | 刀锋之影   | 泰隆     | 6300 |
| 2 | 迅捷斥候   | 提莫     | 6300 |
| 3 | 光辉女郎   | 拉克丝    | 1350 |
| 4 | 发条魔灵   | 奥莉安娜   | 6300 |
| 5 | 至高之拳   | 李青     | 6300 |
| 6 | 无极剑圣   | 易      |  450 |
| 7 | 疾风剑豪   | 亚索     | 6300 |
+----+--------------+--------------+-------+
7 rows in set (0.00 sec)

-- 20点充值
REPLACE INTO last_transaction (transId,username,amount,trans_time,remark) 
  VALUES (null, 'chenhaha', 30, '2020-06-11 20:00:20', '会员充值');
 
-- 21点买皮肤
REPLACE INTO last_transaction (transId,username,amount,trans_time,remark) 
  VALUES (null, 'chenhaha', 100, '2020-06-11 21:00:00', '购买盲僧至高之拳皮肤');