In PostgreSQL, you can use the isalnum function to determine if a string is alphanumeric or not. The isalnum function returns TRUE if all characters in the string are either alphabetic or numeric, and FALSE […]
In PostgreSQL, the maximum number of columns for a table is limited by the system configuration parameter MaxTupleAttributeNumber, which is set to 1664 by default. However, it is possible to increase this limit by modifying […]
The IF [NOT] EXISTS DDL clause is a useful feature in PostgreSQL that can help prevent errors during object creation and removal. This clause allows database administrators to specify whether or not to create or […]
Index wildcard is a technique used in PostgreSQL to create an index on a partial string in a column, rather than indexing the entire column. This technique can improve query performance when searching for data […]
Monitoring query latency, wait events, and locks in PostgreSQL helps identify and diagnose performance bottlenecks. Here’s a guide on how to monitor these aspects: Here’s a sample query to gather information about locks, wait events, […]
PostgreSQL execution plans provide information on how the database intends to execute a given query. Understanding execution plans is crucial to identify performance issues and optimize query performance. Here are some of the things to […]
SORT operations and the ordered property of index scans are important aspects of PostgreSQL query optimization and performance tuning. In this explanation, we will explore these concepts in detail with real data examples. SORT operations […]
Clustered and non-clustered indexes are important database indexing techniques used in PostgreSQL to improve the performance of SQL queries. In this answer, we will explain the implementation of clustered and non-clustered indexes in PostgreSQL, provide […]
Parameterized queries and bind parameters are important concepts in PostgreSQL (and other database systems) that can help improve performance, security, and maintainability of SQL queries. Parameterized queries are SQL queries where placeholders are used for […]
Regular vacuuming and reindexing of PostgreSQL infrastructure is essential for optimal performance because it helps to reclaim disk space, reduce index bloat, and maintain data consistency. Here are some of the reasons why regular vacuuming […]
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