mysql - 子查询的解决方法返回超过 1 个错误

Question

请帮帮我。 我正在创建一个查询，以柱状方式列出客户贷款(REF_NO 字段)支付的所有本金 (SLE_CODE = 11) 和利息 (SLE_CODE = 23)。

我试过这段代码，但它返回“子查询返回多于 1 行”的错误。

SELECT DATE_FORMAT(TR_DATE, '%M %d, %Y'), SL_CLIENTID, REF_NO, SLE_CODE, (select amt from sldtl where REF_NO = 1958
AND SL_CLIENTID = 1782 AND SLC_CODE = 12 AND SLE_CODE = 23) as interest,
(select amt from sldtl sd where REF_NO = 1958
AND SL_CLIENTID = 1782 AND SLC_CODE = 12 AND SLE_CODE = 11) as principal
FROM sldtl
WHERE REF_NO = 1958
AND SL_CLIENTID = 1782 AND SLC_CODE = 12

请引用这个sqlfiddle:

http://sqlfiddle.com/#!9/3ac32/2

提前谢谢你。

Answer 1

样本数据和期望的结果会很有帮助。我很确定你想要条件聚合。也许是这样的:

SELECT DATE_FORMAT(TR_DATE, '%M %d, %Y'),
       SL_CLIENTID, REF_NO,
       SUM(CASE WHEN SLE_CODE = 23 THEN amt END) as interest,
       SUM(CASE WHEN SLE_CODE = 11 THEN amt END) as principal
FROM sldtl
WHERE REF_NO = 1958 AND SL_CLIENTID = 1782 AND SLC_CODE = 12
GROUP BY DATE_FORMAT(TR_DATE, '%M %d, %Y'),
         SL_CLIENTID, REF_NO;