Tag: SQL

Oracle Database Commands

  1. SELECT: This command is used to retrieve data from one or more tables in an Oracle database.
  2. FROM: This command specifies the table from which you want to retrieve data.
  3. WHERE: This command is used to filter data based on specific conditions.
  4. GROUP BY: This command is used to group data based on one or more columns.
  5. ORDER BY: This command is used to sort data in ascending or descending order.
  6. JOIN: This command is used to combine data from two or more tables.
  7. INSERT INTO: This command is used to insert new data into a table.
  8. UPDATE: This command is used to update existing data in a table.
  9. DELETE: This command is used to delete data from a table.
  10. CREATE TABLE: This command is used to create a new table in an Oracle database.
  11. ALTER TABLE: This command is used to modify the structure of an existing table.
  12. DROP TABLE: This command is used to delete an existing table from an Oracle database.
  13. COMMIT: This command is used to save changes made to the database.
  14. ROLLBACK: This command is used to undo changes made to the database.
  15. GRANT: This command is used to give privileges to a user or role.
  16. REVOKE: This command is used to remove privileges from a user or role.

These are just some of the commonly used Oracle database commands, but there are many more depending on the specific needs of your database.

Most useful SQL Commands

  1. SELECT: This command is used to retrieve data from one or more tables in a database.
  2. FROM: This command specifies the table from which you want to retrieve data.
  3. WHERE: This command is used to filter data based on specific conditions.
  4. GROUP BY: This command is used to group data based on one or more columns.
  5. ORDER BY: This command is used to sort data in ascending or descending order.
  6. JOIN: This command is used to combine data from two or more tables.
  7. INSERT INTO: This command is used to insert new data into a table.
  8. UPDATE: This command is used to update existing data in a table.
  9. DELETE: This command is used to delete data from a table.
  10. CREATE TABLE: This command is used to create a new table in a database.
  11. ALTER TABLE: This command is used to modify the structure of an existing table.
  12. DROP TABLE: This command is used to delete an existing table from a database.

These are just some of the most useful SQL commands, but there are many more depending on the specific needs of your database.