Patricia Camille C. Janaban IS31S1 Information Management WHERE clause When collecting data from a single table or merging many tables, the SQL WHERE clause is used to set a condition. Only a specific value from the table is returned if the stated condition is met. Condition A condition is a set of expressions and logical (Boolean) operators that returns one of three values: TRUE, FALSE, or unknown. Comparison Conditions A comparison (or relational) operator is a mathematical symbol that allows two values to be compared. In instances when one expression is compared to another, comparison operators are utilized. A comparison's outcome can be TRUE, FALSE, or UNKNOWN (an operator that has one or two NULL expressions returns UNKNOWN). Between Condition The BETWEEN operator chooses values from a specified range. Numbers, text, and dates can all be used as values. The BETWEEN operator takes both the start and finish values into account. In Condition The SQL IN condition (also known as the IN operator) makes it simple to see if an expression matches any element in a list. It's utilized in SELECT, INSERT, UPDATE, and DELETE statements to help eliminate the need for multiple OR conditions. Like Condition The SQL LIKE condition allows you to match patterns in a query using wildcards. In a SELECT, INSERT, UPDATE, or DELETE statement, the LIKE condition is utilized in the WHERE clause. Logical Condition A logical condition combines or inverts the outputs of two component conditions to give a single result depending on them. Describe DESCRIBE is a word that means "to describe." Because tables exist in databases, we utilize the Explain or DESC(both are the same) command to describe the structure of a table. Patricia Camille C. Janaban IS31S1 Information Management References: Tutorial is on point. (n.d.). SQL - WHERE Clause. SQL - Where clause. Retrieved December 4, 2021, from https://www.tutorialspoint.com/sql/sql-where-clause.htm. Database SQL quick reference. SQL Conditions. (2005, November 4). Retrieved December 4, 2021, from https://docs.oracle.com/cd/B19306_01/server.102/b14195/sqlqr04.htm. SQL comparison operator. w3resource. (n.d.). Retrieved December 4, 2021, from https://www.w3resource.com/sql/comparison-operators/sql-comparison-operators.php. SQL BETWEEN Operator. SQL between operator. (n.d.). Retrieved December 4, 2021, from https://www.w3schools.com/sql/sql_between.asp. www.techonthenet.com. (n.d.). SQL: In condition. Retrieved December 4, 2021, from https://www.techonthenet.com/sql/in.php. Www.techonthenet.com. (n.d.). SQL: Like Condition. SQL: Like condition. Retrieved December 4, 2021, from https://www.techonthenet.com/sql/like.php. Database SQL reference. Moved. (2005, July 10). Retrieved December 4, 2021, from https://docs.oracle.com/cd/B19306_01/server.102/b14200/conditions004.htm. SQL: Describe statement. GeeksforGeeks. (2018, March 21). Retrieved December 4, 2021, from https://www.geeksforgeeks.org/sql-describe-statement/.
