本文介绍了Oracle通过join选择/更新的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 我有tableA和tableB可以通过id加入。我试图弄清楚如何编写它,以便我可以选择tableA.color和tableB.value并对tableA中的列进行更新,名为 颜色从行的蓝色变为红色,但仅当tableB中名为 value 的列大于10时才会更改。 所以结果集 颜色 价值 蓝色7 蓝色3 红色12 蓝色1 红色14 我的尝试: 我在想什么 < pre>从tableA 内连接中选择tableA.color,tableB.value tableB on tableA.id = tableB.id update tableA set tableA.color =red where tableB.value> 10 不确定语法和包括连接。解决方案 检查: Oracle / PLSQL:UPDATE Statement [ ^ ] 在那里你会找到一种基于第二个值更新数据的方法表 I have tableA and tableB which can join by ids. I am trying to figure out how to write it such that I can select the tableA.color and tableB.value and do an update for the column in tableA called color that will get changed from "blue" to "red" for a row but only if the column in tableB called value is greater than 10.so the result set color value blue 7 blue 3 red 12 blue 1 red 14What I have tried:I was thinking something along the lines of<pre>select tableA.color, tableB.valuefrom tableAinner join tableB on tableA.id = tableB.idupdate tableAset tableA.color = "red"where tableB.value > 10Wasn't sure on syntax and including the join. 解决方案 Check this: Oracle / PLSQL: UPDATE Statement[^]There you'll find a way to update data based on values in second table. 这篇关于Oracle通过join选择/更新的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 09-13 06:08