34 lines
783 B
Plaintext
34 lines
783 B
Plaintext
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/* list suppliers who have QTYs greater than the the QTYs of s4 */
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select snumber, qty
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from spj
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where qty > ALL
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(select qty
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from spj
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where snumber = 's4');
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/*List suppliers who have qty smaller than any qty of s2*/
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SELECT snumber, qty
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FROM spj
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WHERE qty < ANY(SELECT qty FROM spj WHERE snumber = "s2");
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/*List the snumber and QTYs of the supplier who relates with the snumber to the QTYs that are greater than the AVG QTYs of the particular supplier.
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i.e. for s1 the AVG of all its QTY is x... You must list all the QTYs of s1 that are greater than x.
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*/
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select snumber, qty
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from spj as a
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where qty >
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(select avg(qty)
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from spj
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where a.snumber = snumber);
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/* EXISTS demo */
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select *
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from supplier a
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where not EXISTS
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(select * from spj
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where snumber = a.snumber);
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