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Home/ Questions/Q 9160181
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Editorial Team
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Editorial Team
Asked: June 17, 20262026-06-17T13:40:35+00:00 2026-06-17T13:40:35+00:00

i got two foreign keys in a table, with a primary key. Primary_key Name

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i got two foreign keys in a table, with a primary key.

Primary_key Name Foreignkey1 Foreignkey2

1           test1  2               1
2           test2  2               1    <--- how do i prevent this from entering
3           test3  2               2

either in java or mysql, i am displaying the data in a jtable

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  1. Editorial Team
    Editorial Team
    2026-06-17T13:40:36+00:00Added an answer on June 17, 2026 at 1:40 pm

    add UNIQUE constraint

    ALTER TABLE tableName ADD CONSTRAINT tb_uq UNIQUE (Foreignkey1, Foreignkey2)
    
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