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Legal Studies將 MySQL 記錄（價格值）乘以後取格式
要設定記錄格式，請使用 FORMAT()。我們先建立一個表 -
mysql> create table DemoTable -> ( -> Price decimal(10,4), -> Rate decimal(10,4) -> ); Query OK, 0 rows affected (0.96 sec)
使用“insert”命令在表中插入一些記錄 -
mysql> insert into DemoTable values(1000,10.2); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(2000,20.4); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(100,5); Query OK, 1 row affected (0.16 sec)
使用“select”語句顯示錶中的所有記錄 -
mysql> select *from DemoTable;
這將產生以下輸出 -
+-----------+---------+ | Price | Rate | +-----------+---------+ | 1000.0000 | 10.2000 | | 2000.0000 | 20.4000 | | 100.0000 | 5.0000 | +-----------+---------+ 3 rows in set (0.00 sec)
以下是設定記錄格式的查詢 -
mysql> select format((Price * Rate),2) from DemoTable;
這將產生以下輸出 -
+--------------------------+ | format((Price * Rate),2) | +--------------------------+ | 10,200.00 | | 40,800.00 | | 500.00 | +--------------------------+ 3 rows in set (0.00 sec)
更新於: 2019-12-17
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