数据SQL 的相关内容

问答 2022-07-07 来自：开发者社区

按照CDC文档提供的oracle案例，我对products表进行插入数据后，sql client查询

按照CDC文档提供的oracle案例，我对products表进行插入数据后，sql client查询该表发现数据没有刷新进去，这是什么问题？oracle用的案例中的镜像。

问答 2022-07-05 来自：开发者社区

大佬们，我使用oracle cdc进行数据同步，oracle源端有数据，但是sql cli中查询源表

大佬们，我使用oracle cdc进行数据同步，oracle源端有数据，但是sql cli中查询源表没有任何数据诶。这是什么情况，oracle版本是阿里云镜像容器oracle10

问答 2022-06-30 来自：开发者社区

如何根据多元索引查询最后一条数据，达到 sql order by desc limit 1的效果呢？

文章 2022-05-30 来自：开发者社区

大家好~我是米洛！我在从0到1打造一个开源平台, 也在编写一套完整的接口测试平台系列教程，希望大家能够多多支持。回顾上节内容我们编写了非常恶心的数据驱动部分，而且有些东西笔者还讲的不清不楚的。接下来我们就来让数据构造器支持sql。先看看之前的数据构造器:画了许多饼，要支持的大概是这么多测试用例sqlredishttppython方法目前我们还只支持一种呢~所以我们要尽快支持起来，保证造数的丰富性....

问答 2022-05-13 来自：开发者社区

同样表同样索引同样数据同样的sql语句在oracle和pg 中的执行计划，pg走不了索引。

文章 2022-05-13 来自：开发者社区

【Mysql】只保留最新的10条数据，其余数据删除的sql语句怎么写

author：咔咔wechat：fangkangfk$id获取的数据的前9条，数据出来是一个二维数组，格式如下然后将id组装为一维数组，使用tp5的whereNotIn来讲不是在这前9个的id的数据全部删掉，然后在新加一条数据整好是10条数据 $id = Db::query("select el_id from tm_error_log order by el_id desc limit 9")....

问答 2022-05-10 来自：开发者社区

如何检查原始数据是否有问题，无法生成SQL则快速失败？

文章 2022-04-21 来自：开发者社区

PHP从零开始--字段修饰符&&数据操作&&SQL语言

文章目录一、字段修饰符1.1主键1.2自动增长1.3非空1.4默认值1.5外键二、对数据的操作2.1增加数据2.2删除数据2.3更新数据2.4查询数据2.4.1查询所有的数据2.4.2查询指定字段2.4.3去除重复字段2.4.4where表达式详解2.4.5分组查询2.4.6排序三、 SQL语言3.1DML3.2DDL3.3DCL一、字段修饰符1.1主键主键使用primary key修饰 ....

问答 2022-04-03 来自：开发者社区

数据迁入中的SQL Server的功能都受什么限制呀？

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