![]() Aggregation performed on large data sets using sum(), min(), max(), avg(), and so on can also be compared or filtered using comparison operators.Ĭomparison Operators reserved words facilitate comparing values of expressions comprising various values from tables.Comparison operator like equality and inequality operators helps filter out records that satisfy this condition. Handling missing values is an important task in database management.These operators are compatible with various versions of SQL databases like Parallel Data Warehouse, Azure SQL database, Azure SQL data warehouse, SQL Server 2008, and later versions.These help easily compare numerical, non-numerical, or date field data values.These operators enable the development of precise queries with limited use of other logical operators (like OR or AND) in INSERT, UPDATE, and SELECT statements.Query: SELECT employeeid, lastname, firstname, birthdate FROM employee where birthdate >= '' and birthdate <='' ![]() To return employees who are born between 19, the query uses both greater than and less than operator: Query: SELECT employeeid, lastname, firstname, birthdate FROM employee where birthdate '' To return employees whose birthdate is filled in, the query is to remove cases with no date of birth present, SELECT employeeid, lastname, firstname, birthdate FROM employee where The query below can be used to get the employees whose date of birth is not beyond 8th Dec 1968. Query: SELECT employeeid, lastname, firstname, birthdate FROM employee where birthdate <= '' To get the employees born before Jan 1971, the query is: (Employeeid, lastname, firstname, birthdate) To create an employee table and insert five records into it: We shall perform a comparison operation on them as below to derive essential insights from them. There can be different data tables where key performance metrics (KPIs) must be evaluated. This employee data has the Employee Id, first name, last name, and date of birth of these employees. Let us consider an example of “Employees” data. This means the value can be greater than or equal to the right-hand expression.Įxpression !< variable/another expression/constant The not less than operator checks for an expression to be “not less than” to right-hand side values. Syntax: Expression !> variable/another expression/constant 8. This means the value can be less than or equal to the right-hand expression. The not greater than operator checks for an expression to be “not greater than” to right-hand side values. ![]() ![]() Syntax: Expression variable/another expression/constant 7. ![]() The less than operator checks for an expression to be “less than” to right-hand side values. Syntax: Expression = variable/another expression/constant 5. The less than or equal to operator checks for an expression “less than or equal to” to right-hand side values. Syntax: Expression != variable/another expression/constant Įxpression variable/another expression/constant 3. Exclamation mark! signifies “not.” this signifies “neither less than nor greater than,” thus implying not equal to operation. The two ways of doing this are using != or. The inequality or not equal to an operator is used to check if values are not equal in an expression or query. Syntax: expression = variable/another expression/constant 2. The equality or equal operator is used to check if values are equal or not an expression. Let us now understand each of these in detail, accompanied by relevant examples. ![]()
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