mysql - substring of a column from another SQL -

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i have following table.

+--------------------+-----+ |fardet_cd_fare_basis|part2|     +--------------------+-----+ |            meo00rig|  00r| |            meo00rig|  rig| |            meo00rig|    i| +--------------------+-----+

i need extract "fartdet_cd_fare_basis" first part of chain until appearance of "part2", example be:

+--------------------+-----+--------+ |fardet_cd_fare_basis|part2|     num| +--------------------+-----+--------+ |            meo00rig|  00r|     meo| |            meo00rig|  rig|   meo00| |            meo00rig|    i| meo00ri| +--------------------+-----+--------+

i'm working spark sql, used sql solution. ideas?

i think understand want. try this.

livedemo

select fardet_cd_fare_basis,part2,   substr(            fardet_cd_fare_basis,             1,             instr(fardet_cd_fare_basis,part2)-1          ) der_sub your_table

output

+----------------------+--------+---------+ | fardet_cd_fare_basis | part2  | der_sub | +----------------------+--------+---------+ | meo00rig             | (null) | (null)  | | meo00rig             | o      | me      | | meo00rig             | 00r    | meo     | | meo00rig             | rig    | meo00   | | meo00rig             | 00     | meo     | | meo00rig             |      | meo00r  | | meo00rig             | r      | meo00   | | meo00rig             | 00     | meo     | +----------------------+--------+---------+

note: if part2 doesn't exists in first column, not in output. if part2 null null. can handle them separately if want.


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