sql - MySQL LEFT JOIN Query with WHERE clause -


hope can having hard time understanding how query properly

i have member table , member_card table. member_card has column member, card associated member. both tables have lastmodifieddate column. member can have none, 1 or several cards.

i need return members lastmodifieddate >= sincedate (given date) or card (if any) lastmodifieddate >= sincedate.

imagine sincedate 2013-01-01 00:00:00. want output this:

[{     "id": "001o000000fsas7iaf",     "lastmodifieddate": 2013-01-01 00:00:00,     "member_card": null }, {     "id": "001o000000frpixiaz",     "lastmodifieddate": 2012-12-12 00:00:00,      "member_card": [{         "id": "a00o0000002w8fgiay",         "member": "001o000000fhdsoian",         "lastmodifieddate": 2013-01-01 00:00:00      }, {         "id": "a00o0000002uymtiam",         "member": "001o000000fhdsoian",         "lastmodifieddate": 2012-12-12 00:00:00     }] }, {     "id": "001o000000fsag7iaf",     "lastmodifieddate": 2013-01-01 00:00:00,     "member_card": [{         "id": "a00o0000002w8ffiay",         "member": "001o000000fhdsoian",         "lastmodifieddate": 2012-12-12 00:00:00     }] }]

the 1st member matching lastmodifieddate without cards. 2nd member non-matching lastmodifieddate, has 2 cards associated, , 1 of them has matching lastmodifieddate. 3rd 1 member matching lastmodifieddate card.

thanks got following query:

select member.*,card.* member inner join ( select distinct member.id  mid member  inner join member_card      on member_card.member = member.id  , ( member.lastmodifieddate >= sincedate       or member_card.lastmodifieddate >= sincedate ) ) on a.mid=member.id inner join member_card card on card.member=a.mid

which works fine missing case member doesn't have card associated.

i tried change inner joins left joins it's ignoring date comparison :-(

can me one?

you want move date check of inner query.

try like:

select member.*,card.*  member  left join member_card card on card.member=member.id member.id in (     select distinct m.id member m         left join member_card mc on (mc.member = m.id)         ( m.lastmodifieddate >= sincedate           or mc.lastmodifieddate >= sincedate )  )

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