PostgreSQL Data Types: Numeric, String, Date, JSON & Arrays

PostgreSQL: Slice Array - Get Subset of Array Elements

Feb 20, 2026
POSTGRESQL

PostgreSQL: Slice Array Extract a subset of elements from an array using slicing syntax. Problem Array: {Python, SQL, Java, C++,...

2 min Read

PostgreSQL: String Concatenation - Combine Strings

Feb 20, 2026
POSTGRESQL

PostgreSQL: String Concatenation I’ve spent countless hours building user-facing reports, email templates, and data exports where I needed to combine...

9 min Read

PostgreSQL: Subtract Hours from Timestamp - Go Back in Time

Feb 20, 2026
POSTGRESQL

PostgreSQL: Subtract Hours from Timestamp I frequently need to look back in time—finding events from the past 24 hours, calculating...

2 min Read

PostgreSQL: Sum Array Column - Add All Array Elements

Feb 20, 2026
POSTGRESQL

PostgreSQL: Sum Array Column When you store related numeric values in an array—like multiple sales amounts for an employee, or...

3 min Read

PostgreSQL: Trim Whitespace from Strings - Remove Leading/Trailing Spaces

Feb 20, 2026
POSTGRESQL

PostgreSQL: Trim Whitespace from Strings If you’ve ever imported data from CSV files, spreadsheets, or external sources, you know the...

8 min Read

PostgreSQL: Truncate Decimal - Remove Decimal Places

Feb 20, 2026
POSTGRESQL

PostgreSQL: Truncate Decimal I’ve run into scenarios where I need to be conservative with numbers—always rounding down, never up. Pricing...

6 min Read