blackboard ora-01422: exact fetch returns more than requested number of rows

How do you handle exact fetch returns more than requested number of rows?

Cause: More rows were returned from an exact fetch than specified. Action: Rewrite the query to return fewer rows or specify more rows in the exact fetch.

What is the exception raised when the select query returns more than one row?

For example, if your SELECT statement returns more than one row, TimesTen returns an error (exception) at runtime.

How do you handle too many rows exceptions in PL SQL?

There are four ways to make sure your code is safe from this error.Select rows using the primary key. In Listing A, I selected by last_name, and it's quite likely there will be more than one employee with the same last name. ... Select aggregate functions. ... Limit the query using ROWNUM. ... Put the SELECT in its own block.Jul 31, 2007

Is it good to use limit keyword with bulk collect?

LIMIT Clause But this is not advisable when the total record that needs to be loaded is very large, because when PL/SQL tries to load the entire data it consumes more session memory. Hence, it is always good to limit the size of this bulk collect operation.Feb 26, 2022

What operator is used to prevent the error ORA-01427 single row subquery returns more than one row?

IN operator is used to prevent the error: 'ORA-01427:single row sub query returns more than one row'. IN operator is used to specify which values to compare or reword the query so only one row is retrieved.

How do you handle subquery returning more than one value?

You may use the IN, ANY, or ALL operator in outer query to handle a subquery that returns multiple rows. Contents: Using IN operator with a Multiple Row Subquery. Using NOT IN operator with a Multiple Row Subquery.Feb 26, 2020

What is Ora 01403 No data found?

The ORA-01403 error derives from an SQL query meant to return all data requested, but no data was found. The error is often associated with SELECT INTO clauses, which fetch rows or sets of columns from a database.

What does the collection method limit returns?

What is Collection Method LIMIT? Collection method LIMIT which is actually a PL/SQL function returns the maximum number of elements that a VARRAY can hold. This means that by using this function you can find out how many elements you can store in a VARRAY.Jan 11, 2019

Which of the following is the SQL code for exception with name too many rows?

When an ORA-01422 is triggered, your SELECT INTO statement is retrieving multiple rows of data or none at all. If it is returning multiple, the predefined exception TOO_MANY_ROWS will be raised, and for no returns the PL/SQL will raise NO_DATA_FOUND.

What is mutating error?

A mutating table error (ORA-04091) occurs when a row-level trigger tries to examine or change a table that is already undergoing change (via an INSERT, UPDATE, or DELETE statement). In particular, this error occurs when a row-level trigger attempts to read or write the table from which the trigger was fired.Dec 13, 2016

Can we use commit in trigger?

You can't commit inside a trigger anyway.Nov 21, 2017

Which of the following options would you use to limit the number of rows fetched by bulk collect at a time?

Using an explicit cursor and the LIMIT clause of the BULK COLLECT syntax to limit the total number of rows returned.