CASE WHEN的语法：

SELECT c.bank_account,
       c.id,
       css.value,
       b.name bankName,
       d.name branceName,
       CASE
         WHEN css.value = '1' THEN d.name
         WHEN css.value = '2' THEN b.name || d.name
         ELSE d.name
       END AS qualifiedBankName
  FROM ff_comp_bank c
  LEFT JOIN ff_bank_branch d ON c.branch_id = d.id
  LEFT JOIN ff_bank b ON b.id = d.bank_id
  LEFT JOIN ff_sys_setting css ON css.name = 'BANK_BRANCH_NAME'
 WHERE c.company_id = '2';

晚上的火车，回家过年了... D4652