HAVING proviso empowers you to determine conditions that channel which gathering results show up in the eventual outcomes.
The WHERE statement places conditions on the chose sections, while the HAVING provision places conditions on gatherings made by GROUP BY proviso.
Syntax
Following is the situation of HAVING proviso in a SELECT question.
SELECT
FROM
WHERE
GROUP BY
HAVING
ORDER BY
HAVING condition should follow GROUP BY provision in a question and should likewise go before ORDER BY proviso whenever utilized. Following is the sentence structure of the SELECT assertion, including HAVING condition.
SELECT column1, column2
FROM table1, table2
WHERE [ conditions ]
GROUP BY column1, column2
HAVING [ conditions ]
ORDER BY column1, column2
Example
Consider COMPANY table with the accompanying records.
ID NAME AGE ADDRESS SALARY
---------- ---------- ---------- ---------- ----------
1 Paul 32 California 20000.0
2 Allen 25 Texas 15000.0
3 Teddy 23 Norway 20000.0
4 Mark 25 Rich-Mond 65000.0
5 David 27 Texas 85000.0
6 Kim 22 South-Hall 45000.0
7 James 24 Houston 10000.0
8 Paul 24 Houston 20000.0
9 James 44 Norway 5000.0
10 James 45 Texas 5000.0
Following is the model, which will show the record for which the name tally is under 2.
sqlite > SELECT * FROM COMPANY GROUP BY name HAVING count(name) < 2;
This will create the accompanying outcome.
ID NAME AGE ADDRESS SALARY
---------- ---------- ---------- ---------- ----------
2 Allen 25 Texas 15000
5 David 27 Texas 85000
6 Kim 22 South-Hall 45000
4 Mark 25 Rich-Mond 65000
3 Teddy 23 Norway 20000
Following is the model, which will show the record for which the name check is more prominent than 2.
sqlite > SELECT * FROM COMPANY GROUP BY name HAVING count(name) > 2;
This will create the accompanying outcome.
ID NAME AGE ADDRESS SALARY
---------- ---------- ---------- ---------- ----------
10 James 45 Texas 5000