How to deal with case sensitivity in postgresql?

@adan 

PostgreSQL is case-sensitive by default, meaning that 'ABC' and 'abc' are considered different values in queries. To manage case sensitivity in PostgreSQL, you have a few options:

1. Use the ILIKE operator: If you want to perform a case-insensitive search, you can use the ILIKE operator instead of LIKE. For example:

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SELECT * FROM table_name WHERE column_name ILIKE 'abc';

1. Use the LOWER or UPPER functions: You can convert values to lowercase or uppercase before comparing them in queries. For example:

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

1. Change the collation of the database or column: You can change the collation of the database or specific columns to make them case-insensitive. This will affect sorting and comparison operations for text data. For example:

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ALTER DATABASE database_name COLLATE "C";

1. Use the CITEXT data type: PostgreSQL provides a case-insensitive text data type called CITEXT. You can use CITEXT instead of TEXT to store case-insensitive text data in a column. For example:

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CREATE TABLE table_name (column_name CITEXT);

By using these approaches, you can effectively manage case sensitivity in PostgreSQL queries according to your specific requirements.