How can you handle multiple rows without using loops in PL SQL?

How can you handle multiple rows without using loops in PL SQL?

Handle Multiple Rows Without Loops

1. Adding delimiters to a file which has no delimiter.
2. Data from 1 column to be separated in multiple columns.
3. Handling null in outer join.
4. Datastage – flat file concat header.
5. Single row converted into multiple rows using transformer stage.

Why do we need cursors in PL SQL?

The major function of a cursor is to retrieve data, one row at a time, from a result set, unlike the SQL commands which operate on all the rows in the result set at one time. Cursors are used when the user needs to update records in a singleton fashion or in a row by row manner, in a database table.

How do I print multiple rows in PL SQL?

1. Statement 1. CREATE TABLE employees AS SELECT * FROM hr.employees.
2. Statement 2. It’s the simplest and most efficient way to fetch multiple rows from a dynamically-constructed SELECT.
3. Statement 3. I can OPEN FOR a dynamically-constructed SELECT statement and then FETCH BULK COLLECT all the rows.
4. Statement 4.

How do you run a trigger in PL SQL?

Syntax for creating trigger:

1. CREATE [OR REPLACE ] TRIGGER trigger_name.
2. {BEFORE | AFTER | INSTEAD OF }
3. {INSERT [OR] | UPDATE [OR] | DELETE}
4. [OF col_name]
5. ON table_name.
6. [REFERENCING OLD AS o NEW AS n]
7. [FOR EACH ROW]
8. WHEN (condition)

How do you exit a loop cursor in PL SQL?

5 Answers

1. simple exit. loop –do something; exit; end loop;
2. conditional exit. loop –do something; exit when “condition”; end loop;

How to iterate through the result of a PLSQL select?

I can get a list of the tables to search with something like: The next step is to iterate through that list of table names and output each table that contains a particular value in the EmployeeId column. For example, output might be something like:

How to iterate over table of objects in Oracle?

An OBJECT is an SQL type but RECORD on the other hand is a PL/SQL type, you could think of it more of a C/C++ like struct. Note that this wont raise any exception if the table is empty thus you need to handle if there are no data, for example you could use .COUNT like this:

Which is better a cursor or a loop in SQL Server?

Pros and Cons of Using a While Loop to Iterate Through Table Rows in SQL Server. There are also benefits to use a WHILE loop compared to a cursor. While loops are faster than cursors. While loops use less locks than cursors. Less usage of Tempdb: While loops don’t create a copy of data in tempdb as a cursor does.

How to loop through table rows without cursor?

The idea is to loop trough the table rows ordered by the CursorTestID column and update the RunningTotal column with the sum of the CursorTestID column value and the value of the RunningTotal column of the previous row. But before starting, first we need to generate some test rows with the next script.