Today, We want to share with you nested select sql.In this post we will show you sql nested select join, hear for sql multiple nested queries we will give you demo and example for implement.In this post, we will learn about inline query in sql with an example.
sql multiple subqueries in (select statement)
In this tutorial we learn to all about nested select sql Examples like as a SQL – Sub Queries, Subqueries with the INSERT Statement, UPDATE Statement, DELETE Statement, Nested SQL Queries, multiple nested SELECTs in one statement or many more.
Also Read: Nested Queries Subqueries in SQL Example
SQL – Sub Queries
SQL> SELECT * FROM MEMBERS WHERE ID IN (SELECT ID FROM MEMBERS WHERE SALARY > 5487) ;
Subqueries with the INSERT Statement
SQL> INSERT INTO MEMBERS_BKP SELECT * FROM MEMBERS WHERE ID IN (SELECT ID FROM MEMBERS) ;
Subqueries with the UPDATE Statement
SQL> UPDATE MEMBERS SET SALARY = SALARY * 0.25 WHERE AGE IN (SELECT AGE FROM MEMBERS_BKP WHERE AGE >= 27 );
Subqueries with the DELETE Statement
SQL> DELETE FROM MEMBERS WHERE AGE IN (SELECT AGE FROM MEMBERS_BKP WHERE AGE >= 27 );
Examples of Nested SQL Queries
SELECT AVG(number_of_pupils) FROM classes WHERE teacher_id IN ( SELECT id FROM teachers WHERE course = 'Laravel' OR course = 'Vuejs');
multiple nested SELECTs in one statement.
SELECT * FROM pupils WHERE class_id = ( SELECT id FROM classes WHERE number_of_pupils = ( SELECT MAX(number_of_pupils) FROM classes));
Using subqueries outside of WHERE
SELECT course, MAX(salary_by_course.avg_salary) AS max_salary FROM ( SELECT course, AVG(monthly_salary) AS avg_salary FROM teachers GROUP BY course) salary_by_course;
SQL Nested subqueries
SELECT work_id,AVG(salary) FROM members GROUP BY work_id HAVING AVG(salary)< (SELECT MAX(AVG(min_salary)) FROM works WHERE work_id IN (SELECT work_id FROM work_history WHERE department_id BETWEEN 50 AND 100) GROUP BY work_id);
Example -2 : Nested subqueries
SELECT req_num,req_date,req_amount,advance_amount FROM orders WHERE req_amount>5014 AND req_date<'01-AUG-08' AND ADVANCE_AMOUNT < ANY(SELECT OUTSTANDING_AMT FROM MEMBER WHERE GRADE=3 AND CUST_COUNTRY<>'Lodhika' AND opening_amt<8457 AND EXISTS (SELECT * FROM agents WHERE commission<.12));
I hope you get an idea about nested select sql.
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