mysql - 将多条sql更新语句合并为一条语句

Question

我有以下用于 MySQL 的更新语句:

UPDATE billing_info_test SET Enagement = '800000032764' WHERE LinkedAccountId = '123456789101' AND Engagement = '800000026680';
UPDATE billing_info_test SET Enagement = '808000000000' WHERE LinkedAccountId = '123456789101' AND Engagement = '807000000041';
UPDATE billing_info_test SET Enagement = '807000000412' WHERE LinkedAccountId = '123456789101' AND Engagement = '870000012569';
UPDATE billing_info_test SET Enagement = '808000000223' WHERE LinkedAccountId = '123456789101' AND Engagement = '807000000279';
UPDATE billing_info_test SET Enagement = '808000000223' WHERE LinkedAccountId = '123456789101' AND Engagement = '807000000282';
UPDATE billing_info_test SET Enagement = '808000000223' WHERE LinkedAccountId = '123456789101' AND Engagement = '870000000403'; 

如何将所有这些组合成一个语句？

Answer 1

你可以使用 CASE 表达式:

UPDATE billing_info_test 
SET Enagement = CASE Enagement
                     WHEN '800000026680' THEN '800000032764'
                     WHEN '807000000041' THEN '808000000000'
                     WHEN ... THEN ...
                END
WHERE LinkedAccountId = '123456789101' 
  AND Engagement IN ('800000026680', '807000000041', ...);