LIKE operator is used for data matching patterns. let's see what is LIKE and how it is used to get sensitive data. In PostgreSQL, we use a LIKE operator to make a case sensitive. We can change the collation setting to modify the default behavior. The same works for the like operator in MSSQL and MYSQL. MySQL and MSSQL have the case insensitive behavior by default i.e where column = PATreturns true for 'pat', 'PAT', 'pAt'. If we want to use the case insensitive comparison use the ILIKE operator for example Column like 'Pat' or column like 'pAt' returns the true result for 'pat'. The same works with the like operator Column like 'Pat' or column like 'pAt' will provide the false result. String comparison is case sensitive in PostgreSQL for example WHERE column_name = 'pat' returns the value exactly equal to the pat. Let's see whether the column values are case-sensitive in SQL. We can change behavior by changing collation in MSSQL. But they are case sensitive on Unix and Linux-based operating systems as tables are case sensitive in Unix. As a result of this case sensitivity of databases depends upon how the operating system works. In MSSQL, table and column names are not case sensitive on windows as MSSQL represents databases as a file and directories on the server. The uppercase and lowercase alphabets are treated equally i.e columns are case insensitive in MYSQL As you can see in the following create table query, the name of the column is a fact. In the following query as you can see the MYSQL returns the column name in a case that is created at the time of table creation. In MYSQL the column name in the select statement is not case sensitive. When we create the table, the case of the column name is preserved even when not quoted. We can change behavior by changing collation in MySQL. In MYSQL, table and column names are not case sensitive on windows as MYSQL represents databases as a file and directories on the server. Let's look into some of the relational databases: MYSQL. Let's discuss a few DBMS systems and try to understand how case sensitivity works in different DBMS. Some Operating systems such as Linux, Windows, or *macOS * also impact the behavior of the DBMS system. The case-sensitivity depends on different DBMS. Are SQL Table and Column Names Case-Sensitive? Let's see whether the columns and table are case sensitive or not. And if we consider different parts like tables and column names, values in columns may be sensitive or insensitive in different DBMS. No matter how you write them they will function. If we consider the keyword in SQL like ( SELECT, WHERE, and FROM) these are insensitive in all the DBMS. The case sensitive differs from one database to another database as some are case sensitive and some are case insensitive. It is a very complicated topic, whether SQL is case-sensitive or not. When we differentiate a word or letter in upper or lower case is called case sensitivity and when the words are treated equally is called case insensitive. Before discussing whether or not SQL is case-sensitive or not let's understand what case-sensitive means.
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