sql - Insert different rows between Table A and Table B into Table B -

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i have 2 identical tables. table has e.g. 100 rows, table b has 60 rows. want insert "missing" rows table table b. find different rows use:

select * tablea language = 4 union select * tableb language = 4

how use code correctly "insert into" statement? idea:

insert tableb (select * tablea language = 4 union select * tableb language = 4)

best regards

union may option cause duplications. prefer minus operation.

insert tableb ( select * tablea language=4 minus select * tableb language=4)

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