我有表格 - config.架构:config_name |配置值
I have table - config.
Schema:
config_name | config_value
我想在一个查询中更新多条记录.我是这样尝试的:
And I would like to update multiple records in one query. I try like that:
UPDATE config
SET t1.config_value = 'value'
, t2.config_value = 'value2'
WHERE t1.config_name = 'name1'
AND t2.config_name = 'name2';
但是那个查询是错误的:(
but that query is wrong :(
你能帮我吗?
尝试任一多表更新语法
UPDATE config t1 JOIN config t2
ON t1.config_name = 'name1' AND t2.config_name = 'name2'
SET t1.config_value = 'value',
t2.config_value = 'value2';
这是SQLFiddle 演示
Here is SQLFiddle demo
或有条件更新
UPDATE config
SET config_value = CASE config_name
WHEN 'name1' THEN 'value'
WHEN 'name2' THEN 'value2'
ELSE config_value
END
WHERE config_name IN('name1', 'name2');
这是SQLFiddle 演示
Here is SQLFiddle demo
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