我有下面的代码。小数字符是“.”。我想把它改成“，”。我试图使用替换，但它不工作。你能给我建议一个替代方案吗？

SELECT
,CASE WHEN t1."EID"='10' THEN cast(t1."PAYVal" as decimal(12,2)) ELSE cast(t1."PAYVal"*t2."EXCValue"  as decimal(12,2)) END as plata_LEI
 ,CASE WHEN t1."EID"='2' 
        THEN cast(t1."PAYVal" as decimal(12,2))
      ELSE CASE WHEN t1."EID"='10' THEN cast(t1."PAYVal"/t3."EXCValue"  as decimal(12,2))
           ELSE cast(t1."PAYVal"*t2."EXCValue"/t3."EXCValue" as decimal(12,2))
           END 
    END as plata_EUR

谢谢。