在mysql建表sql里，我们经常会有定义字符串类型的需求。 比方说user表里的名字，就是个字符串。mysql里有两个类型比较适合这个场景。 char和varchar。 声明它们都需要在字段边上加个数组，比如char(100)和varchar(100)，这个100是指当前字段能放的最大字符数。 char和 ...

请问我有一句话是这样的。 select count(*) from content where author='系统管理员' and channelid=240 and outdatetime>='20030701000000' outdatetime 这个字段是 varchar 型 我如何拿他来比大小呢。这样查出来没结果。 outdatetime 里面有 一个 20070725999999 的 ...

So I have this page. The page is taking form-submitted data and saving it to a SQL Server database via stored procedure.<br><br>Just one problem - every time I ...

In part 1, we looked at generating T-SQL style code. In part 2, let's get this thing to run! Last time, I showed how a single SELECT statement can be built to create an executable string of T-SQL.

Version 8.0 of the QuestDB time series database is said to be significantly faster. Furthermore, the open source version now also supports ZFS compression. After just over a month, the developers of ...