2019.01.26
:"1$5PLZP 29
Ϣʔβߴͷઃܭᶆ
Ϣʔβͷ࠷৽ͷߴΛ௨՟ࢦఆͰऔಘ͍ͨ͠ͱ͖
SELECT * FROM user_balance WHERE user_id = hoge AND
currency_id = jpy
Ϣʔβͷ࠷৽ͷߴΛશ௨՟छผͰऔಘ͍ͨ͠ͱ͖
SELECT * FROM user_balance WHERE user_id = hoge
ཧը໘ͰཤྺΛऔಘ͍ͨ͠ͱ͖ʢ௨՟ࢦఆʣ
SELECT * FROM user_balance_log WHERE user_id = hoge AND
currency_id = jpy