What is the method for counting rows in Oracle?

2 years ago
William Carter
2 minutes

There are various methods available in Oracle to count the number of rows.

  1. The COUNT() function is used to tally the total number of rows in a table, including NULL values. For example, the following query will return the number of rows in a table named table_name:
  2. How many records are there in the table?
  3. Using the pseudo column ROWNUM: ROWNUM is a pseudo column used to return the sequence of rows retrieved in a query. It can be combined with a subquery to count the number of rows. For example, the following query will return the number of rows in a table named table_name:
  4. Count the total number of rows in the table named table_name.
  5. By using the ANALYZE statement: The ANALYZE statement retrieves statistical information about a table, including the number of rows. For example, the following query will return the number of rows for a table named table_name:
  6. Analyze the statistics of a table named table_name and retrieve the number of rows from the user_tables where the table name is ‘TABLE_NAME’.
  7. By utilizing the DBA_TABLES view: DBA_TABLES view contains information of all tables in the database, including the number of rows. This view can be used to query the number of rows in a table. For example, the following query will return the number of rows for a table named table_name:
  8. Retrieve the number of rows from the database table named ‘TABLE_NAME’.

It should be noted that certain methods mentioned above may require corresponding permissions to be used.

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