sql - Remove duplicates from MySQL table where 2 fields are the same -


so have table fields id (ai, primary key), ticker, pricedate, price.

i have bunch or records share same pricedate , ticker. there should 1 record per ticker given pricedate.

how go removing these duplicate records, given pricedate , ticker not unique fields?

delete your_table id not in  (   select *    (     select min(id)     your_table     group pricedate, ticker   ) x )

Comments

Post a Comment

Popular posts from this blog

c# - Operator '==' incompatible with operand types 'Guid' and 'Guid' using DynamicExpression.ParseLambda<T, bool> -

i'm using dynamic linq library , there source code , basic docu , nuget version pm> install-package dynamiclinq i'm trying construct clause involves guids i have tried string "id == @0" . parameter array object[] value ( guid xxxx ) var whereclausesb = buildlogicalkeywhereclause2(entity, logicalkey); //build string var parms = buildparamarray(entity, logicalkey); // object[] var wherelambda = ofsi.bos.core.dynamicexpression.parselambda<t, bool>(whereclausesb.tostring(),parms); //parse an exception thrown in dynamicexpression.parselambda operator '==' incompatible operand types 'guid' , 'guid' i have tried guid , string.(fail) i tried , "id = @0" (fail). string == string works, int32==int32 not guid == guid not any ideas? try using equals method instead of == operator in string: "id.equals(@0)"
Read more