How do you resolve ORA-01427 single row subquery returns more than one row?

How do you resolve ORA-01427 single row subquery returns more than one row?

Dmytro offered this advice to resolve ORA-01427: Try to add and rownum=1 to your subquery conditions if you DO NOT care about the value from the list or DO sure that they are the same. A single row subquery returns only one row. It can be used with the equal comparison operators (=,<,>,<>, etc).

How do I fix a subquery with more than one row?

select * from table where id= (multiple row query); Where multiple row query returns multiple rows.

What operator would you choose to prevent this Oracle error message ORA-01427 single row subquery returns more than one row?

Then what operator is used to prevent ORA-01427 in SELECT statement? In practice, SELECT should use IN operator instead of = (equal operator) in order to accommodate more than one row returned by the subquery.

Can subquery return multiple rows?

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).

Is a subquery that use value from outer query?

In a SQL database query, a correlated subquery (also known as a synchronized subquery) is a subquery (a query nested inside another query) that uses values from the outer query. Because the subquery may be evaluated once for each row processed by the outer query, it can be slow.

Which operator can be used in multiple row subqueries?

Operators that can be used with multiple-row subqueries include IN, ALL, ANY, and EXISTS. 10.

How do I have multiple rows in one row in SQL?

Here is the example.

1. Create a database.
2. Create 2 tables as in the following.
3. Execute this SQL Query to get the student courseIds separated by a comma. USE StudentCourseDB. SELECT StudentID, CourseIDs=STUFF. ( ( SELECT DISTINCT ‘, ‘ + CAST(CourseID AS VARCHAR(MAX)) FROM StudentCourses t2. WHERE t2.StudentID = t1.StudentID.

How do I fix subquery returned more than one value?

Some ideas:

1. Fix the data such that the existing subquery returns only 1 record.
2. Fix the subquery such that it only returns one record.
3. Add a top 1 and order by to the subquery (nasty solution that DBAs hate – but it “works”)
4. Use a user defined function to concatenate the results of the subquery into a single string.

Can multiple-row subqueries return multiple columns?

SQL: Multiple Column Subqueries You can write subqueries that return multiple columns.

What is difference between subquery and nested query?

When a query is included inside another query, the Outer query is known as Main Query, and Inner query is known as Subquery. In Nested Query, Inner query runs first, and only once. Outer query is executed with result from Inner query. Hence, Inner query is used in execution of Outer query.

Does subquery run first?

With a normal nested subquery, the inner SELECT query runs first and executes once, returning values to be used by the main query. A correlated subquery, however, executes once for each candidate row considered by the outer query. In other words, the inner query is driven by the outer query.

How do I display multiple rows in one row?

Why does Ora 01427 return more than one row?

The Oracle docs note this on the ORA-01427 error*: ORA-01427 single-row subquery returns more than one row. Cause: The outer query must use one of the keywords ANY, ALL, IN, or NOT IN to specify values to compare because the subquery returned more than one row.

What causes Oracle subquery to return more than one row?

The ORA-01427 is a straightforward query error in Oracle. The cause of the error is a subquery returning more than one row of information. This error in multi-row returns on the subquery originates from an outer query failing to use appropriate, designated keywords to specify values for comparison in the subquery.

How to resolve ora-01427 job failed by Trigger?

ORA-01427 in Job Failed by Trigger. I will talk about them respectively in the following sections. In which, the first error pattern is very common and easy to solve. But the second one is not so obvious, you need more patience to solve it.

How to return more than one row in SQL?

Action: Use ANY, ALL, IN, or NOT IN to specify which values to compare or reword the query so only one row is retrieved. On Oracle Server and PL/SQL User Forum, Adam Wilbur received an ORA-01427 error code and received this information: Here’s what I am trying to do… This query returns multiple rows, all of which I need to update in TABLEA.