CAST in PostgreSQL - Examples & AI Generator

Working with CAST in PostgreSQL can be confusing—especially when you need to convert data types for reporting, analytics, or app integration. PostgreSQL CAST syntax varies from other databases, making it harder to remember the right commands when you’re short on time. AI2sql lets you skip the syntax struggle and generate the exact CAST queries you need in 10 seconds—no coding required. Perfect for SQL developers, data analysts, and engineers who want fast, reliable conversions across any schema.

CAST Syntax in PostgreSQL

PostgreSQL supports typical SQL CAST operations but requires correct type names and structure. Here’s the basic format:

CAST (expression AS target_data_type)

Or, using PostgreSQL shorthand:

expression::target_data_type

• expression – the value or column you want to convert

• target_data_type – the new data type (e.g., INTEGER, TEXT, DATE)

CAST Examples You Can Generate Instantly

Here are practical CAST PostgreSQL examples you can copy, adapt, or generate instantly with AI2sql:

1. Convert customer_id from TEXT to INTEGER

SELECT CAST(customer_id AS INTEGER) AS customer_id_int
FROM customers;

2. Show total order value as TEXT for reporting tools

SELECT order_id, CAST(total_value AS TEXT) AS total_value_str
FROM orders;

3. Format shipped_date from TIMESTAMP to DATE

SELECT order_id, shipped_date::date AS shipped_only_date
FROM orders WHERE shipped_date IS NOT NULL;

Generate CAST queries in 10 seconds with AI2sql

Why Use AI2sql Instead of Manual CAST Coding

• Zero manual syntax lookup: PostgreSQL CAST syntax is handled for you

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Ready to automate CAST syntax? Try AI2sql Generator — or Learn CAST details for deeper understanding.

FAQ: CAST in PostgreSQL

• Q: Can I CAST to any data type in PostgreSQL?
  A: You can CAST to any compatible data type. Some types require explicit casting or supported conversion functions.

• Q: What’s the difference between CAST and double-colon (::) syntax?
  A: Both achieve the same result. Double-colon (::) is PostgreSQL-specific shorthand for the standard CAST syntax.

• Q: When should I use CAST in PostgreSQL?
  A: Use CAST when you need to convert column values for calculations, joins, formatting, or data export.

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