大约有 19,000 项符合查询结果（耗时：0.0299秒） [XML]
Can I use a function for a default value in MySql?
...
Sad that MySQL has been around for as long as it has but you can't implement a default UUID for a column without a trigger. The reason for this is embedded in the 1980's technology that apparently still exists in the MySQL base code (...
App Inventor 2 中文网原创内容 · App Inventor 2 中文网
...科普】App Inventor 2 添加超过10个屏幕会怎样？
【算法】如何计算1加到100的总和？（经典循环的写法）
【算法】App Inventor 2 算法之二分算法（Binary Search）实现，快速查找定位
组件用法
【微数据库】每次打开app时保持上一...
How to do a FULL OUTER JOIN in MySQL?
I want to do a Full Outer Join in MySQL. Is this possible? Is a Full Outer Join supported by MySQL?
15 Answers
...
Is SQL syntax case sensitive?
Is SQL case sensitive. I've used MySQL and SQL Server which both seem to be case in-sensitive. Is this always the case? Does the standard define case-sensitivity?
...
What is the benefit of zerofill in MySQL?
...ow what is the benefit/usage of defining ZEROFILL for INT DataType in MySQL ?
9 Answers
...
Get table names using SELECT statement in MySQL
In MySQL, I know I can list the tables in a database with:
12 Answers
12
...
css中使用变量，:root伪元素的使用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
css中使用变量，:root伪元素的使用css_root前言使用css的全局变量，可以减少写很多重复代码。比如设置一个全局主题色变量，整个项目用到这个颜色的地方，都用变量设置，就很方便了。一、root伪类和css变量1 :root伪类在刚 前...
How do I show a MySQL warning that just happened?
I just ran a simple MySQL CREATE TABLE statement that produced the line
3 Answers
3
...
Invalid default value for 'create_date' timestamp field
...t ignore this option. This is server option. If you have access to my.ini (mysql configuration file), then remove NO_ZERO_DATE from sql-mode option and restart server.
– Devart
Feb 8 '12 at 11:44
...
MySQL “Group By” and “Order By”
... non-aggregate columns in a SELECT with a GROUP BY clause is non-standard. MySQL will generally return the values of the first row it finds and discard the rest. Any ORDER BY clauses will only apply to the returned column value, not to the discarded ones.
IMPORTANT UPDATE
Selecting non-aggregate col...