0
a single row subqury is a query which will return a single row and single column
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
An SQL subquery can appear inside of another SQL subquery?
Yes, but more the levels of sub queries, the more would be the time taken to execute the query.
Which construct in SQL is used to test whether a subquery has any tuples in its result?
Exists
What is a sql sub query?
It is possible to embed a SQL statement within another. When this is done on the WHERE or the HAVING statements, we have a subquery construct. The syntax is as follows: SELECT "column_name1"FROM "table_name1"WHERE "column_name2" [Comparison Operator](SELECT "column_name3"FROM "table_name2"WHERE [Condition])
How you delete duplicate row of table in SQL?
This can be different depending on the SQL server involved. Please specify the Database being used (ie, mysql, postgresql, oracle, ms SQL Server) I am using SQL 2005 express, what is the command, i can only get... delete... and what else? lets say i want to delete a duplicate row that is row 2.
How do you delete a row without using delete command in SQL?
You drop the table and the row is deleted along with it.
What is a correlated query?
Correlated query has a subquery in it which accesses the column name of a table alias which is outside the subquery.
Can you use subquery in values clause of an insert statement?
Yes INSERT INTO your_table (col1, col2, col3) VALUES (1, 'a string', (SELECT TOP 1 empName FROM Employees)) Tested just now. Just make sure your subquery returns a single datum.
What are subqueries used for in a database?
A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.A subquery is basically a query inside another query. Sometimes a main query needs to process data that is the result of another query. To extract that data a subquery could be built into a field in a main query. This is known as a subquery.
What are co related sub queries?
The main differencre between subquery and co-related subquery is that in subquery child query is executed first n then parent,but in co-related subquery main query is executed first(even though parenthesis are present) and then child query. Example of co-related subquery select dname from dept where exists (select deptno from emp where dept.deptno=emp.deptno); select dname from dept where not exists (select deptno from emp where dept.deptno=emp.deptno);
What is the difference between JOIN and Subquery?
A join will join two or more tables together by a field related to both tables (ie, relationship of primary and foreign keys). It is typically easy to understand. A subquery statement involves a SELECT statement that selects particular values from a table. The values that the select query selects is dependant upon the subquery. The subquery itself is another SELECT statement.
Write a SQL statement to show the warehouse and average QuantityOnHand of all items stored in a warehouse managed by 'Smith' Use a subquery?
SELECT Warehouse, AVG(QuantityOnHand) AS QuantityOnHand FROM INVENTORY WHERE Warehouse IN (SELECT Warehouse FROM WAREHOUSE WHERE Manager = 'Smith') GROUP BY Warehouse;
What tool allows you to select a single row of pixels in photoshop?
The Single Row Marquee Tool.
