mysql中You can't specify target table for update in FROM clause错误的意思是说,不能先select出同一表中的某些值,再update这个表(在同一语句中)。 例如下面这个sql:
update market_data.curves set id_calendar = 'Bond_CN' where id_curve in
(SELECT id_curve FROM market_data.curves where cd_curve_type = 'IR_Bond'
and
id_curve not like 'IR_Bond_CNY_FIX_EX_GOV_SPT') ;
将select出的结果再通过中间表select一遍,这样就规避了错误。
update market_data.curves set id_calendar = 'Bond_CN' where id_curve in
(select id_curve from
(SELECT id_curve FROM market_data.curves where cd_curve_type = 'IR_Bond'
and
id_curve not like 'IR_Bond_CNY_FIX_EX_GOV_SPT') a);