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Editorial Team
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Asked: 2026-05-20T01:22:21+00:00

I have 2 tables with a few columns: parent (id, name, a) child (id,

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I have 2 tables with a few columns: 

parent (id, name, a) 
child (id, parent_id, name)

I cannot manage to find the proper SQL query to delete all parents that have no children and a<10. This is for SQLite shipped with Android 2.1. Anybody could help?

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1 Answer

  1. Editorial Team
    delete from parent
where a < 10
      and not exists (select * from child where parent.id = child.parent_id)
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