sql - SQLite combo-request with concatenating results -
i use sqlite, , want create request such option.
i have 2 tables a, b. in records contain field id
integers, , field string, example name
in table b have columns names:
number a<name1> a<name2> a<name3>...
i need number
table b, field a<namek>
equal value, name
id
in table a. know id
, want know number
b.
so have 2 requests.
select name my_name id=<value>;
and after want that:
select number b a||my_name = <value>;
( || - mean concatenacting of strings), it's not work:(
update - example of tables structures:
a:
id name 1 2 b 3 c
b:
number aa ab ac 10 1 2 3 11 4 5 6 12 7 8 9
so example id=2
, value in b=5
, name=b
, column name in b ab
. result number=11
id=3, value=6
. result number=11
id=3, value=4
. result no result
without more information table structure, highly assume flawed. save a<name>
's number
in individual rows, if necessary column flags.
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