SQL beginner like ilike filter query

How to Use LIKE and ILIKE in SQL?

Using LIKE and ILIKE in SQL is a SQL query that this sql query filters rows based on partial text matches, allowing for case-sensitive and case-insensitive searches.. Formula Genius generates and validates this formula automatically from a plain-English prompt.

Discover how to effectively filter your SQL queries for partial text matches with LIKE and ILIKE for case-insensitivity.

Generate This Formula Browse Library

The Formula

Prompt

"Filter rows using LIKE for partial text matching, and ILIKE for case-insensitive matching in PostgreSQL"

SQL 
SELECT * FROM table_name WHERE column_name LIKE 'pattern' OR column_name ILIKE 'pattern';

This SQL query filters rows based on partial text matches, allowing for case-sensitive and case-insensitive searches.

Step-by-Step Breakdown

  1. SELECT * FROM table_name: Specifies the table to retrieve data from.
  2. WHERE: Introduces the condition for filtering the rows.
  3. column_name: The specific column in the table to apply the filter.
  4. LIKE 'pattern': Searches for rows that match the specified pattern, case-sensitive.
  5. ILIKE 'pattern': Searches for rows that match the specified pattern, case-insensitive.

Edge Cases & Warnings

  • Using wildcards (%) incorrectly may lead to unexpected results.
  • Empty strings in the pattern can return all rows.
  • Case sensitivity may cause missed matches if ILIKE is not used when needed.

Examples

Prompt

"SELECT * FROM users WHERE name LIKE 'Jo%';"

SQL 
Returns all users whose names start with 'Jo'.
Prompt

"SELECT * FROM products WHERE description ILIKE '%apple%';"

SQL 
Returns all products with 'apple' in the description, regardless of case.

Frequently Asked Questions

What is the difference between LIKE and ILIKE?

LIKE is case-sensitive while ILIKE is case-insensitive.

Can I use wildcards with LIKE and ILIKE?

Yes, you can use '%' for any sequence of characters and '_' for a single character.

How do I match exact phrases?

Use LIKE with the exact phrase enclosed in single quotes.

Can't find what you need?

Describe any formula in plain English and Formula Genius will generate, explain, and validate it — instantly.

Generate Custom Formula See Examples