This is important in programming, because it helps us to find answers and make decisions.The return value of a comparison is either true or false. These values are known as Boolean values, and you will learn more about them in the Booleans and If..Else chapter....
Introduced in PHP 7. Try it »PHP Increment / Decrement OperatorsThe PHP increment operators are used to increment a variable's value.The PHP decrement operators are used to decrement a variable's value.OperatorSame as... DescriptionTry it ++$x Pre-increment Increments $x by one, then ...
IN()Whether a value is within a set of values ISTest a value against a boolean IS NOTTest a value against a boolean IS NOT NULLNOT NULL value test IS NULLNULL value test LIKESimple pattern matching MEMBER OF()Returns true (1) if first operand matches any element of JSON array passed ...
The in OperatorThe in operator returns true if a property is in an object, otherwise false:Object Example const person = {firstName:"John", lastName:"Doe", age:50}; ("firstName" in person); ("age" in person); Try it Yourself » ...
Comparison operators are fully described in theJS Comparisonschapter. JavaScript String Comparison All the comparison operators above can also be used on strings: Example lettext1 ="A"; lettext2 ="B"; letresult = text1 < text2; Try it Yourself » ...
ALL means that the condition will be true only if the operation is true for all values in the range. ALL Syntax With SELECTSELECT ALL column_name(s) FROM table_name WHERE condition; ALL Syntax With WHERE or HAVINGSELECT column_name(s) FROM table_name WHERE column_name operator ALL (...
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INTRUE if the operand is equal to one of a list of expressionsTry it LIKETRUE if the operand matches a patternTry it NOTDisplays a record if the condition(s) is NOT TRUETry it ORTRUE if any of the conditions separated by OR is TRUETry it ...
||Logical orReturns True if one of the statements is truex < 5 || x < 4Try it » !Logical notReverse the result, returns False if the result is true!(x < 5 && x < 10)Try it » You will learn more about comparison and logical operators in theBooleansandIf...Elsechapters. ...
Fields The following operators can be used to update fields: $currentDate: Sets the field value to the current date $inc: Increments the field value $rename: Renames the field $set: Sets the value of a field $unset: Removes the field from the document ...