14 lines
466 B
SQL
14 lines
466 B
SQL
select bhv.id,count(1) as Bound
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from bst_hardware_version bhv
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left join bst_device bd
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on bhv.id = bd.hardware_version_id
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where bd.mch_id is not null
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group by bhv.id
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select bhv.id,count(1) as unBound
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from bst_hardware_version bhv
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left join bst_device bd
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on bd.hardware_version_id = bhv.id
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where bd.mch_id is null
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group by bhv.id |