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How do I create a user with the same privileges as root in MySQL/MariaDB? [closed]
How do I create a user with the same privileges as root in MySQL/MariaDB?.
1 Answer
1...
PreparedStatement IN clause alternatives?
...in select or DML, since it is Oracle, which offers lightyears of more than MySQL or similar simple database engines. PL/SQL allows you to hide the storage model from your application domain model in an effective way.
The trick here is:
we need a call which accepts the long string, and store somewh...
MongoDB: Combine data from multiple collections into one..how?
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Doing unions in MongoDB in a 'SQL UNION' fashion is possible using aggregations along with lookups, in a single query. Here is an example I have tested that works with MongoDB 4.0:
// Create employees data for testing the union.
d...
Export and Import all MySQL databases at one time
I want to keep a backup of all my MySQL databases. I have more than 100 MySQL databases. I want to export all of them at the same time and again import all of them into my MySQL server at one time. How can I do that?
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How to create a database from shell command?
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cat filename.sql | mysql -u username -p # type mysql password when asked for it
Where filename.sql holds all the sql to create your database. Or...
echo "create database `database-name`" | mysql -u username -p
If you really only want to cr...
What's the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN? [duplicate]
...rence between INNER JOIN , LEFT JOIN , RIGHT JOIN and FULL JOIN
in MySQL ?
3 Answers
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二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...是分成不同的Block，然后对各个Block进行纠错编码，对于如何分组，我们可以查看QR Code Spec的第33页到44页的Table-13到Table-22的定义表。注意最后两列：
Number of Error Code Correction Blocks ：需要分多少个块。
Error Correction Code Per Blo...
MySQL - SELECT WHERE field IN (subquery) - Extremely slow why?
...B and you only select indexed fields (and things are not too complex) than MySQL will resolve your query using only the indexes, speeding things way up.
General solution for 90% of your IN (select queries
Use this code
SELECT * FROM sometable a WHERE EXISTS (
SELECT 1 FROM sometable b
WHERE...
XPath OR operator for different nodes
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@user569008: | is the union set operator.
– user357812
Mar 18 '11 at 19:35
1
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MySQL ('root'@'%') does not exist 的问题 - 爬虫/数据库 - 清泛IT社区，为创新赋能！
MySQL ('root'@'%') does not exist的问题：
在使用mysql时出现问题： The user specified as a definer ('root'@'%') does not exist。
一般是由于root用户对全局host无访问权限。因此只要给root用户添加一个访问权限即可。
解决办法：
登陆mysql ，...