mysql - How to add `select count` as a column -


i have table has invite_code , invited_by columns.

i select users , number of users invited user. done in 1 query?

e.g. have these data:

id | invite_code | invited_by    -----------------------------      1  |          11 |  2  |          22 |        11 3  |          33 |        11 4  |          44 |        22

i add select count(*) users u.invite_code = invited_by result:

id | invite_code | invited_by | invite_num ------------------------------------------ 1  |          11 |            |         2 2  |          22 |         11 |         1 3  |          33 |         11 |         0 4  |          44 |         22 |         0

i using mysql

try this:

select [id]       ,[invcode]       ,[invby], (select count(*) table t t.[invby]=t1.[invcode])   table  t1

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