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

PostgreSQL: Cast VARCHAR to Boolean - String to Bool Conversion

Feb 20, 2026
POSTGRESQL

PostgreSQL: Cast VARCHAR to Boolean I’ve dealt with legacy systems that store boolean flags as text—‘yes’ and ’no’, or ‘1’...

2 min Read

PostgreSQL: Change String Case - Uppercase Lowercase Conversion

Feb 20, 2026
POSTGRESQL

PostgreSQL: Change String Case I’ve dealt with enough inconsistent data to know that case matters more than you’d think. One...

8 min Read

PostgreSQL: Check If Array Contains NULL

Feb 20, 2026
POSTGRESQL

PostgreSQL: Check If Array Contains NULL Working with arrays, you sometimes need to know: “Does this array have any NULL...

3 min Read

PostgreSQL: Check If String Is Date - Validate Date Format

Feb 20, 2026
POSTGRESQL

PostgreSQL: Check If String Is Date When you’re importing messy data, you need to know which rows have valid dates...

2 min Read

PostgreSQL: Combine Date and Time into Timestamp

Feb 20, 2026
POSTGRESQL

PostgreSQL: Combine Date and Time into Timestamp I’ve worked with systems where DATE and TIME are stored separately—maybe for legacy...

6 min Read

PostgreSQL: Compare JSON Arrays - Check Array Equality

Feb 20, 2026
POSTGRESQL

PostgreSQL: Compare JSON Arrays When you’re working with JSON data that contains arrays—like skill sets for employees, permissions for roles,...

3 min Read

PostgreSQL: Convert Date to Unix Timestamp - Epoch Conversion

Feb 20, 2026
POSTGRESQL

PostgreSQL: Convert Date to Unix Timestamp You need to work with Unix timestamps — the number of seconds since January...

4 min Read

PostgreSQL: Convert Integer to Decimal - Precise Numeric Conversion

Feb 20, 2026
POSTGRESQL

PostgreSQL: Convert Integer to Decimal You need to convert integer values to decimals for precise calculations, financial data, or reporting....

3 min Read

PostgreSQL: Convert Text to Date - Parse String to Date Type

Feb 20, 2026
POSTGRESQL

PostgreSQL: Convert Text to Date When you’re importing data from CSV files, APIs, or external systems, dates almost always come...

3 min Read

PostgreSQL: Extract JSON Path - Navigate JSON Hierarchy

Feb 20, 2026
POSTGRESQL

PostgreSQL: Extract JSON Path Working with API responses, configuration data, or semi-structured information, you’ll constantly encounter deeply nested JSON. You...

2 min Read

PostgreSQL: Fill Missing Dates - Time Series Completion

Feb 20, 2026
POSTGRESQL

PostgreSQL: Fill Missing Dates When you’re analyzing time series data—sales by day, events by hour, user activity by week—you often...

3 min Read

PostgreSQL: Filter by JSONB Field - Query JSON Data

Feb 20, 2026
POSTGRESQL

PostgreSQL: Filter by JSONB Field If you’re storing data as JSONB in PostgreSQL and need to filter rows based on...

6 min Read