Table of Contents
- 1 How can I count the number of rows affected in PL SQL?
- 2 How do you check when the table is last updated in Oracle?
- 3 How do you get the number of rows affected by a query?
- 4 How can you handle multiple rows without using loops in PL SQL?
- 5 How do you check if a table is being used in Oracle?
- 6 How do I find the last DDL on a table?
- 7 How do I count the number of rows in SQL query?
- 8 How do I find the number of rows in a table in SQL?
How can I count the number of rows affected in PL SQL?
You use the sql%rowcount variable. You need to call it straight after the statement which you need to find the affected row count for.
How do you check when the table is last updated in Oracle?
How to find when a table was last modified in oracle
- If you want to find, when a table was last modified like insert,update ,delete, then use the dictionary table dba_tab_modifications.
- Insert into test data:
- As you can see, the dba_tab_modification is not showing any rows.
How do you use Rowcount?
Here are the common ways ROWCOUNT is used in a SQL statement:
- Set @@ROWCOUNT to the number of rows affected or read. Rows may or may not be sent to the client.
- Preserve @@ROWCOUNT from the previous statement execution.
- Reset @@ROWCOUNT to 0 but do not return the value to the client.
How do you get the number of rows affected by a query?
MySQL ROW_COUNT() can be used to get the total number of rows affected by MySQL query. To illustrate it we are creating a procedure with the help of which we can insert records in a table and it will show us how many rows have been affected.
How can you handle multiple rows without using loops in PL SQL?
Handle Multiple Rows Without Loops
- Adding delimiters to a file which has no delimiter.
- Data from 1 column to be separated in multiple columns.
- Handling null in outer join.
- Datastage – flat file concat header.
- Single row converted into multiple rows using transformer stage.
How do I count rows in SQL?
The COUNT() function returns the number of rows that matches a specified criteria.
- SQL COUNT(column_name) Syntax. The COUNT(column_name) function returns the number of values (NULL values will not be counted) of the specified column:
- SQL COUNT(*) Syntax.
- SQL COUNT(DISTINCT column_name) Syntax.
How do you check if a table is being used in Oracle?
- table_name – table/view name with schema name.
- type – TABLE. VIEW.
- referencing_object – name of object which use specific table/view.
- referencing_type – type of found object.
How do I find the last DDL on a table?
The last DDL time is easy: select last_ddl_time from user_objects where object_name = :tab; As you’re finding, if you’ve not got auditing, last DML write time is a little trickier…
What can you substitute for if exists?
An alternative for IN and EXISTS is an INNER JOIN, while a LEFT OUTER JOIN with a WHERE clause checking for NULL values can be used as an alternative for NOT IN and NOT EXISTS.
How do I count the number of rows in SQL query?
To counts all of the rows in a table, whether they contain NULL values or not, use COUNT(*). That form of the COUNT() function basically returns the number of rows in a result set returned by a SELECT statement.
How do I find the number of rows in a table in SQL?
The SQL COUNT() function returns the number of rows in a table satisfying the criteria specified in the WHERE clause. It sets the number of rows or non NULL column values. COUNT() returns 0 if there were no matching rows.
How do I print multiple rows in PL SQL?
- Statement 1. CREATE TABLE employees AS SELECT * FROM hr.employees.
- Statement 2. It’s the simplest and most efficient way to fetch multiple rows from a dynamically-constructed SELECT.
- Statement 3. I can OPEN FOR a dynamically-constructed SELECT statement and then FETCH BULK COLLECT all the rows.
- Statement 4.