mysql - How to use my horizontal query result to another SQL query -

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i need use horizontal query result sql query. how it, please help. suppose have 2 tables:

tab1: ________________________________________ |id | arid | seq1 | seq2 | seq3 | seq4 | |___|______|______|______|______|______| |a1 | ar01 |    |    c |    b |    d | |a2 | ar02 |    c |    d |    |    b | |___|______|______|______|______|______|  tab2: _____________________ |arid | seqn | code | |_____|______|______| |ar01 |    |    1 | |ar01 |    g |    4 | |ar01 |    b |    2 | |ar01 |    d |    3 | |ar01 |    c |    8 | |ar01 |    f |    6 | |ar01 |    e |    5 | |ar01 |    h |    7 | |ar02 |    |    1 | |ar02 |    h |    8 | |_____|______|______|

well need result this:

resulttab: _____________________ |arid | seqn | code | |_____|______|______| |ar01 |    |    1 | |ar01 |    c |    8 | |ar01 |    b |    2 | |ar01 |    d |    3 | |_____|______|______|

it fetch seq1, seq2, seq3 , seq4 arid tab1 , return mapped values tab2 arid.

please me. thank you...

please use union all benefit of index.

select t1.arid, t1.seq1 seqn tab1 t1 inner join tab2 t2 on t1.arid = t2.arid t1.arid = 'ar01'   , t1.seqn = t2.seq1  union  select t1.arid, t1.seq2 seqn tab1 t1 inner join tab2 t2 on t1.arid = t2.arid t1.arid = 'ar01'   , t1.seqn = t2.seq2  union  select t1.arid, t1.seq3 seqn tab1 t1 inner join tab2 t2 on t1.arid = t2.arid t1.arid='ar01'   , t1.seqn = t2.seq3  union  select t1.arid, t1.seq4 seqn tab1 t1 inner join tab2 t2 on t1.arid = t2.arid t1.arid='ar01'   , or t1.seqn = t2.seq4

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