Following exercises cover a variety of index types and demonstrate how to create, use, and manage B-tree, Hash, GIN, and GiST indexes in PostgreSQL for performance optimization. 1. Create a B-tree Index on a Tex
Like indexes, foreign key constraints can also impact bulk load performance. This is because each foreign key in each inserted row has to be checked for the existence of a corresponding primary key. Behind-the-scene, PostgreSQL uses a trigger to perform the checking. When loading a large numbe...
Optimize indexes.Use features such as index tuning to automatically analyze query patterns and receive actionable recommendations for creating or dropping indexes to improve performance. Offload read-only operations.If your application supports read-only connection strings, you can offload read-only operatio...
Partial indexes are suitable for tables and queries in cases in which you are interested only in a subset of the data. A good example is indexing a status column that filters out most rows. This case might occur in the real world for a table that contains processed and unprocessed job dat...
Duplicate-named indexes in PostgreSQL, unlike MySQL, are not permitted. Consequently, they are manually renamed to unique ones: 1 2 3 4 5 6 7 8 9 -- example of renaming the indexes in the MySQL DBMS BEGIN; alter table college_pitcher_seasons rename index amateur_player_id to idx_01; ...
(status) Indexes: "customers_arr_idx" btree (arr) Partitions: cust_active FOR VALUES IN ('ACTIVE'), cust_archived FOR VALUES IN ('EXPIRED1', 'EXPIRED2'), cust_others DEFAULT postgres=# \d+ cust_archived Table "public.cust_archived" Column | Type | Collation | Nullable | Default | ...
Best Practices for Using Unique ConstraintUse for Critical Data: Apply UNIQUE constraints to columns that must contain unique values. Combine with NOT NULL: Use NOT NULL to ensure columns with UNIQUE constraints are always populated. Index Performance: Unique constraints automatically create indexes, ...
Optimize Queries:Use indexes and avoid unnecessary columns inSELECTstatements. Source PostgreSQL Documentation In this article, we have explored the basics of SQL using PostgreSQL, including creating tables, inserting data, and querying data with practical examples. ...
Index types and best practices. Partial, unique, and multi-column indexes. Reindexing and maintaining indexes efficiently. Chapter 9: Transactions and Concurrency Transaction properties and isolation levels. Multi-version concurrency control. Deadlock detection and advisory locks. Day 3: Optimisation, Main...
Database migration from Oracle DB to RDS PostgreSQL or Aurora PostgreSQL refers to the complete migration of all of the table structure, data, associated indexes, triggers, and stored procedures. After these are migrat...