36 lines
856 B
Plaintext
36 lines
856 B
Plaintext
/* list the supplier number and supplier name for suppliers who DO NOT supply any parts USE subqueries*/
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select snumber
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from supplier
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where not exists
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(select *
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from spj
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where spj.snumber = supplier.snumber);
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/* list the supplier number and supplier name for suppliers who DO NOT supply any parts USE subqueries*/
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select snumber
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from supplier
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where snumber in /* you may use a NOT in and and omit the FALSE at the end */
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(select *
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from spj
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where spj.snumber = supplier.snumber) = false;
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select snumber
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from supplier
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where snumber in
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(select snumber from spj) = false;
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/* AAAAAAAAAAAAAAAAAA */
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select distinct snumber
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from spj as c
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where not exists
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(select *
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from project as a cross join spj as b
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where c.snumber = b.snumber and not exists
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(select *
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from spj
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where b.snumber=spj.snumber and a.jnumber = spj.jnumber))
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