1.數(shù)據(jù)集
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+---+----------+|id |login_date|+---+----------+|01 |2021-02-28||01 |2021-03-01||01 |2021-03-02||01 |2021-03-04||01 |2021-03-05||01 |2021-03-06||01 |2021-03-08||02 |2021-03-01||02 |2021-03-02||02 |2021-03-03||02 |2021-03-06||03 |2021-03-06|+---+----------+ |
以"連續(xù)登錄"中的數(shù)據(jù)為例：
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select id, concat_ws(',',collect_list(login_date)) cwfrom datagroup by id; |
結(jié)果：
+---+----------------------------------------------------------------------------+
|id |cw |
+---+----------------------------------------------------------------------------+
|01 |2018-02-28,2018-03-01,2018-03-02,2018-03-04,2018-03-05,2018-03-06,2018-03-08|
|02 |2018-03-01,2018-03-02,2018-03-03,2018-03-06 |
|03 |2018-03-06 |
+---+----------------------------------------------------------------------------+
以上面SQL生成的數(shù)據(jù)為基準(zhǔn)，執(zhí)行下列SQL：
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select id, login_datefrom t lateral view explode(split(cw,',')) b AS login_date; |
結(jié)果：
+---+----------+
|id |login_date|
+---+----------+
|01 |2018-02-28|
|01 |2018-03-01|
|01 |2018-03-02|
|01 |2018-03-04|
|01 |2018-03-05|
|01 |2018-03-06|
|01 |2018-03-08|
|02 |2018-03-01|
|02 |2018-03-02|
|02 |2018-03-03|
|02 |2018-03-06|
|03 |2018-03-06|
+---+----------+
到此這篇關(guān)于SQL行轉(zhuǎn)列與列轉(zhuǎn)行的文章就介紹到這了,更多相關(guān)SQL行轉(zhuǎn)列與列轉(zhuǎn)行內(nèi)容請搜索服務(wù)器之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持服務(wù)器之家！
原文鏈接：https://blog.csdn.net/weixin_38037405/article/details/122083226
