How do I get a list of column names in MySQL?
The best way is to use the INFORMATION_SCHEMA metadata virtual database.
Specifically the INFORMATION_SCHEMA.
SELECT `COLUMN_NAME` FROM `INFORMATION_SCHEMA`..
How do I get column names in MySQL?
If your account has access to the information_schema, that opens up even more possibilities, such as:SELECT COLUMN_NAME.FROM information_schema. columns.WHERE table_schema='[database]’ AND table_name='[table_name]’
How do I show column names in SQL?
How do I get the same value in a column in SQL?
The find duplicate values in on one column of a table, you use follow these steps:First, use the GROUP BY clause to group all rows by the target column, which is the column that you want to check duplicate.Then, use the COUNT() function in the HAVING clause to check if any group have more than 1 element.
How do you find the sum of a column in SQL?
The SUM() function returns the total sum of a numeric column.COUNT() Syntax. SELECT COUNT(column_name) FROM table_name. WHERE condition;AVG() Syntax. SELECT AVG(column_name) FROM table_name. WHERE condition;SUM() Syntax. SELECT SUM(column_name) FROM table_name. WHERE condition;