获取城市首字母 添加到这张表的另一个字段

mysql：获取城市首字母 添加到这张表的另一个字段

举例说明

表abc:

表employee

SQL

  
 UPDATE abc a inner join (select id,
 ELT(INTERVAL(CONV(HEX(left(CONVERT(name USING GBK),1)),16,10),
 0xB0A1,0xB0C5,0xB2C1,0xB4EE,0xB6EA,0xB7A2,0xB8C1,0xB9FE,0xBBF7,0xBFA6,0xC0AC,0xC2E8,0xC4C3,0xC5B6,
  0xC5BE,0xC6DA,0xC8BB,0xC8F6,0xCBFA,0xCDDA,0xCEF4,0xD1B9,0xD4D1),
 'A','B','C','D','E','F','G','H','J','K','L','M','N','O','P','Q',  'R','S','T','W','X','Y','Z') as PY 
 from employee) as e on a.id = e.id set a.D = e.PY

运行结果

employee表的name字段的首字母都添加到了abc表的D 字段

同理…