Fallback condition in a mysql select statement -


i want put condition mysql statement. if possible?

this current mysql select statement

select *       `validproduct`       `visible` = 1       , `typeid` = 2       , `sizeid` = 3       group `productid`

so @ moment, selecting products sizeid = 3. want select products size = 1, , if doesn't exist, select sizeid = 3.

my validproducts table contains list of products 6 different sizes associated (which in turn have different pricing). want return of products, lowest sizeid (which have lowest price available product). not products have sizeid 1.

so return data product (sizeid 1, $x); product b (sizeid 3, $y) etc

here way it:

select    vp1.*     validproduct vp1  inner join   (     select        productid, min(sizeid) minsize             validproduct             visible = true ,       typeid = 2     group     productid   ) vp2 on    vp1.productid = vp2.productid ,    vp1.sizeid = vp2.minsize ,    vp1.visible = true ,   vp1.typeid = 2 group    vp1.productid;

explanation:

the outer query have. inner sub-query finds minimum sizeid every product. joining 2 want.

plz see fiddle


Comments

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  2. Anonymous5 May 2020 at 23:27

    Hhh

    ReplyDelete

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