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Option 1 - counting from same domain from different table. select distinct(select count(*) from domain1.table1) "count1", (select count(*) from domain1.table2) "count2" from domain1.table1, domain1.table2; Option 2 - counting from different domain for same table
Here we use the COUNT() function and the GROUP BY clause, to return the number of records for each category in the Products table: Example SELECT COUNT(*) AS [Number of records], CategoryID
SELECT COUNT(CASE WHEN col1 IS NOT NULL AND col2 IS NOT NULL THEN 1 END) FROM demo ; or the MySQL-specific IF function: SELECT COUNT(IF(col1 IS NOT NULL AND col2 IS NOT NULL, 1, NULL)) FROM demo ; where instead of the 1 you can put any non-null constant. A row will be counted only if neither col1 nor col2 is null.
16 Ιουλ 2024 · The HAVING clause with the SQL COUNT() function is used to set a condition with the SELECT statement. Unlike the WHERE clause, which filters rows before grouping, the HAVING clause filters groups after the GROUP BY operation.
In SQL, the HAVING clause is used in combination with the COUNT function to filter the results of a query based on the count of rows returned by a particular condition. This clause is typically used in conjunction with the GROUP BY clause to aggregate data and then filter the aggregated results.
25 Οκτ 2021 · The SQL COUNT function is an aggregate function that returns the number of rows in a specified table. By default, the COUNT function uses the ALL keyword unless you specify a particular parameter value.
30 Αυγ 2022 · In SQL, you use the HAVING keyword right after GROUP BY to query the database based on a specified condition. Like other keywords, it returns the data that meet the condition and filters out the rest.
