In a subquery, you can use group by, but your syntax is incorrect.
Wherever expressions are allowed, subqueries can be used in SELECT, INSERT, UPDATE, and DELETE statements. A subquery can be used as a table expression in the FROM clause or as one of the column expressions in a SELECT list.
An example of a typical correlated subquery is shown below. In this case, the goal is to locate all employees with salaries that are higher than the average for their department. WHERE salary >... SELECT employee number, name FROM employees emp The inner query in the above nested query must be re-executed for each employee.
It is the usage of a SELECT statement inside one of the clauses of another SELECT statement in a more formal sense. A subquery can, in reality, be contained within another subquery, which is contained within another subquery, and so on.
The subquery can be nested inside another subquery or inside a SELECT, INSERT, UPDATE, or DELETE statement. A subquery is frequently added to another SQL SELECT statement's WHERE Clause. You can use comparison operators like >,, or = to make a comparison.
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Khushi Kumari Yadav
5
how can i get pdf of this session
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Arvind Kumar
5
very nice course for begginer to under stand
H
hemant
5
Hello sir, explaination is excellent. I have a request please send the db in excel or SQL file
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Juboraj Juboraj
4
Explain details & easy to understand.
A
Aman Kanaujia
4
All good , but provide the data also for the assignment , Without data the interest is less day by day from the course. So, try to solve this problem as asap.
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Snehil
4
Everything is good but keyboard sounds more harsh and overlap your voice whereas this course is best.
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FAROOK MOHAMMAD
5
Hello sir, explaination is excellent. I have a request please send the db in excel or SQL file.
H
Hari Prakash
4
In SQL Join Function's 2nd video - Teacher's voice dose not match with background content that are plays
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Aakash Mavar
5
Hello sir
Mera Abhi graduation hu he Mene Mechanical Engineering BTech ki Hai me Data analysis me Apna career Bana skat ho Kya
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