Can a subquery return multiple columns?
SQL: Multiple Column Subqueries You can write subqueries that return multiple columns. The following example retrieves the order amount with the lowest price, group by agent code.
How do I SELECT multiple columns in SELECT query?
To select multiple columns from a table, simply separate the column names with commas! For example, this query selects two columns, name and birthdate , from the people table: SELECT name, birthdate FROM people; Sometimes, you may want to select all columns from a table.
What is multi-column subquery in Oracle?
Answer: A multi-Column Subquery is simply a subquery that returns more than one column. Here is a working example of a multi-column subquery: SQL> select.
How subquery pass multiple values?
You have two options:
- use IN clause like this: Select * from [Address] where AddressID IN ( Select AddressID from PersonAddress where PersonID IN (select Claimant from [Case] where CaseID=35) )
- or limit your subqueries with TOP clause.
Which subquery use multiple columns of data?
Multiple-column subqueries enable you to combine duplicate WHERE conditions into a single WHERE clause. Column comparisons in a multiple-column subquery can be pairwise comparisons or nonpairwise comparisons. You can use a subquery to define a table to be operated on by a containing query.
How do I SELECT multiple columns in Google Sheets?
You can also select multiple columns by selecting a column header, pressing and holding the Shift key, and pressing the Left or Right arrow keys to select additional columns.
Can a subquery return multiple values?
Multiple-row subqueries are nested queries that can return more than one row of results to the parent query. Multiple-row subqueries are used most commonly in WHERE and HAVING clauses. Since it returns multiple rows, it must be handled by set comparison operators (IN, ALL, ANY).
Which of the following is are desired when a subquery uses multiple columns of data with one or more rows?
Answer: D. Multi-column sub-queries return more than one column in their result set, multi-row sub-queries return more than one row from the inner query.
How do I select multiple columns in Google Sheets?
How do I select certain columns in Google Sheets?
To select non-adjacent cells, simply hold down the command key (for Mac users, PC users hold down the CTRL key) while making your selections.
Can I use multiple subqueries in the SELECT clause?
I suppose I could use multiple subqueries in the SELECT clause: each returning just ONE column. But this seems horribly inefficient, given that each subquery would be based on the same criteria (the minimum-dated EVENT whose CASE ID matches that of the main query; or NULL if no such events found).
Can a subquery contain another subquery in Oracle?
A subquery can contain another subquery. Oracle allows you to have an unlimited number of subquery levels in the FROM clause of the top-level query and up to 255 subquery levels in the WHERE clause. These are the main advantages of subqueries:
How to return multiple columns in a subselect in DB2?
In DB2 for z/OS, use pack and unpack functions to return multiple columns in a subselect. SELECT *, p.name AS name, p.image, p.price, unpack ( (select PACK (CCSID 1028, ps.price, ps.date) FROM product_special ps WHERE p.id = ps.id AND ps.date < NOW () ORDER BY ps.priority ASC, LIMIT 1)) .*
How does Oracle evaluate a subquery?
Oracle evaluates the whole query above in two steps: First, execute the subquery. Second, use the result of the subquery in the outer query. A subquery which is nested within the FROM clause of the SELECT statement is called an inline view.