How to compare time in MySQL?

2 years ago
Olivia Parker
1 minute

In MySQL, you can use comparison operators to compare times. Here are some common comparison operators.

  1. Equals (=): Compares two times to see if they are the same.
    For example: SELECT * FROM table WHERE time_field = ‘2021-01-01’;
  2. Not equal to (<>) or (!=): Compares two times to see if they are not equal.
    For example: SELECT * FROM table_name WHERE time_field != ‘2021-01-01’;
  3. Greater than (>): compares one time to see if it is larger than another time. For example: SELECT * FROM table name WHERE time field > ‘2021-01-01’;
  4. Less than (<): compare if one time is less than another time. For example: SELECT * FROM table_name WHERE time_field < '2021-01-01';
  5. Greater than or equal to (>=): comparing one time to see if it is greater than or equal to another time. For example: SELECT * FROM table WHERE time_field >= ‘2021-01-01’;
  6. Less than or equal to (<=): Compare if one time is less than or equal to another time. For example: SELECT * FROM table name WHERE time field <= '2021-01-01';

You can also use keywords like BETWEEN and IN to compare time. For example:

  1. To compare if a time falls within a specific range of two dates, you can use the BETWEEN keyword in SQL query like this:
    SELECT * FROM table_name WHERE date_field BETWEEN ‘2021-01-01’ AND ‘2021-12-31’;
  2. Compare a time field with a group of time values using the IN keyword:
    SELECT * FROM table_name WHERE time_field IN (‘2021-01-01’, ‘2022-01-01’, ‘2023-01-01’);

It is important to note that when comparing time, the time field being compared and the comparison time value must have the same data type, usually DATE or DATETIME.

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