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Can you give a clear example of an index on tables?
There is so much written in the docs, it is misleading.
Is the index a...
Hello.
Question on sql under the GROUP BY clause.
Consider grouping by ONE column. Example:
SELECT DEPARTMENT_ID, SUM (SALARY)
FROM Employees
GROUP BY DEPARTMENT_ID;
That is, the...
How to set maximum and minimum group sizes to get records, where count & lt; 5 and count & gt; 2 ?
At the...
In MySQL, the database is created in this way CREATE DATABASE db_name DEFAULT CHARACTER SET 'utf8';
When do you need to SET NAMES 'utf8'...