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  • Postgres and indexes on foreign keys and primary keys
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    We will learn whether (and how) database constraints and indexes are related (or not), how exactly index bitmap scan works, and explore some additional index options available in PostgreSQL
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    It is a good practice to add a primary key to every table When you add a primary key to a table, PostgreSQL creates a unique B-tree index on the column or a group of columns used to define the primary key
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  • PostgreSQL Unique Indexes English - Runebook. dev
    PostgreSQL automatically creates a unique index when a unique constraint or primary key is defined for a table The index covers the columns that make up the primary key or unique constraint (a multicolumn index, if appropriate), and is the mechanism that enforces the constraint
  • Indexes in PostgreSQL - DEV Community
    When you create a primary key in PostgreSQL, it automatically creates a unique B-tree index on the column or group of columns listed in the primary key, but this index is not a clustered index by default
  • PostgreSQL : Documentation: 18: 11. 6. Unique Indexes
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