当一个字段存在逗号分隔时获取最后一个值

select SK.skuId as id,SK.pCode,SK.pSpec,SK.pUnit,SK.pPrice as pSugPrice,SK.pCost,SK.stock,SK.pName,SUBSTRING_INDEX(SUBSTRING_INDEX(pRCode,',',2),',',-1) as pRCode from product_sku_spu as SK where SK.p

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