sql server - SQL- Ignore case while searching for a string

Sql server - SQL- Ignore case while searching for a string

In SQL Server, you can perform a case-insensitive search by using the COLLATE clause with a case-insensitive collation. Here's how you can do it:

SELECT * FROM your_table WHERE your_column COLLATE Latin1_General_CI_AI LIKE '%your_search_string%'

Explanation:

  • your_table: The name of your table.
  • your_column: The name of the column in which you want to search.
  • your_search_string: The string you want to search for.
  • Latin1_General_CI_AI: This is a case-insensitive (CI) and accent-insensitive (AI) collation.

In this example, LIKE is used for pattern matching, and the COLLATE clause with the Latin1_General_CI_AI collation ensures that the search is case-insensitive.

Alternatively, you can use the LOWER() function to convert both the column value and the search string to lowercase for comparison:

SELECT * FROM your_table WHERE LOWER(your_column) LIKE LOWER('%your_search_string%')

This approach converts both the column value and the search string to lowercase before comparison, achieving a case-insensitive search. However, it may affect the performance of the query, especially on large datasets, as it requires a function call for each row.

Examples

  1. How to perform a case-insensitive search in SQL Server? Description: This code demonstrates using the LOWER() or UPPER() function to convert both the search string and the column value to either lowercase or uppercase for case-insensitive comparison.

    SELECT * FROM table_name WHERE LOWER(column_name) = LOWER('search_string');

  2. SQL code to ignore case sensitivity in a search query in SQL Server? Description: This code snippet showcases using the COLLATE clause with a case-insensitive collation such as Latin1_General_CI_AI for case-insensitive comparison.

    SELECT * FROM table_name WHERE column_name COLLATE Latin1_General_CI_AI = 'search_string';

  3. How to ignore case while searching for a string in SQL Server with LIKE operator? Description: This code illustrates using the LOWER() or UPPER() function with the LIKE operator to perform a case-insensitive search in SQL Server.

    SELECT * FROM table_name WHERE LOWER(column_name) LIKE LOWER('%search_string%');

  4. SQL code to perform a case-insensitive search using COLLATE in SQL Server? Description: This code demonstrates using the COLLATE clause with a case-insensitive collation such as Latin1_General_CI_AI for case-insensitive comparison in SQL Server.

    SELECT * FROM table_name WHERE column_name COLLATE Latin1_General_CI_AI = 'search_string';

  5. How to ignore case sensitivity in SQL Server SELECT query? Description: This code snippet showcases using the LOWER() or UPPER() function to convert both the search string and the column value to either lowercase or uppercase for case-insensitive comparison.

    SELECT * FROM table_name WHERE LOWER(column_name) = LOWER('search_string');

  6. SQL code to ignore case while filtering data in SQL Server? Description: This code demonstrates using the COLLATE clause with a case-insensitive collation such as Latin1_General_CI_AI for case-insensitive comparison.

    SELECT * FROM table_name WHERE column_name COLLATE Latin1_General_CI_AI = 'search_string';

  7. How to search for a string ignoring case in SQL Server using LIKE operator? Description: This code illustrates using the LOWER() or UPPER() function with the LIKE operator to perform a case-insensitive search in SQL Server.

    SELECT * FROM table_name WHERE LOWER(column_name) LIKE LOWER('%search_string%');

  8. SQL code to perform a case-insensitive search using LOWER in SQL Server? Description: This code demonstrates using the LOWER() function to convert both the search string and the column value to lowercase for case-insensitive comparison in SQL Server.

    SELECT * FROM table_name WHERE LOWER(column_name) = LOWER('search_string');

  9. How to ignore case sensitivity in SQL Server WHERE clause? Description: This code snippet showcases using the COLLATE clause with a case-insensitive collation such as Latin1_General_CI_AI for case-insensitive comparison.

    SELECT * FROM table_name WHERE column_name COLLATE Latin1_General_CI_AI = 'search_string';

  10. SQL code to search for a string ignoring case in SQL Server? Description: This code demonstrates using the LOWER() or UPPER() function to convert both the search string and the column value to either lowercase or uppercase for case-insensitive comparison.

    SELECT * FROM table_name WHERE LOWER(column_name) = LOWER('search_string');

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