REPLACE in PostgreSQL - Examples & AI Generator

The REPLACE function is a quick way to substitute text in PostgreSQL, but remembering its exact syntax—especially if you’re switching between SQL dialects—can slow you down. Whether you’re a data analyst, engineer, or developer, handling text updates in large datasets can be repetitive and error-prone. With AI2sql, you can convert natural-language prompts into instant, code-ready REPLACE queries for PostgreSQL—no manual coding required. Save time and skip the guesswork every single time you run into a string replacement challenge.

REPLACE Syntax in PostgreSQL

Basic Structure

The PostgreSQL REPLACE function replaces all occurrences of a substring within a string. The syntax is straightforward:

REPLACE(string, from_substring, to_substring)

• string: The source string

• from_substring: The substring to be replaced

• to_substring: The new substring to insert

PostgreSQL-Specific Note

Unlike some other databases, PostgreSQL’s REPLACE handles all string datatypes and is case-sensitive by default. Dynamic field and search/replace strings can be used in queries.

REPLACE Examples You Can Generate Instantly

• Clean up customer phone formats:

• Standardize product codes (replace underscores with dashes):

• Fix typos in order status:

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FAQs

Can REPLACE change multiple different substrings at once?

No, REPLACE in PostgreSQL only substitutes one substring per call. For multiple changes, use nested REPLACE or a combination of functions.

Is REPLACE in PostgreSQL case-sensitive?

Yes, REPLACE only matches exact cases. To match regardless of letter case, use LOWER() or UPPER() around your arguments.

Can I use REPLACE on numeric columns?

You must cast numbers to text first, e.g., REPLACE(CAST(total AS TEXT), '0', '').

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