1. Learn
    2. /
  2. Courses
    3. /
  3. Introduction to Relational Databases in SQL

Exercise

Query information_schema with SELECT

information_schema is a meta-database that holds information about your current database. information_schema has multiple tables you can query with the known SELECT * FROM syntax:

  • tables: information about all tables in your current database
  • columns: information about all columns in all of the tables in your current database
  • …

In this exercise, you'll only need information from the 'public' schema, which is specified as the column table_schema of the tables and columns tables. The 'public' schema holds information about user-defined tables and databases. The other types of table_schema hold system information – for this course, you're only interested in user-defined stuff.

Instructions 1/4

undefined XP
    1
    2
    3
    4

Get information on all table names in the current database, while limiting your query to the 'public' table_schema.