## Comparison Operators

The traditional comparison operators (`=`, `<`, and so on) can be applied to box types. Excepted equality and inequality, the other comparison operators are not useful in the real world but allow B-tree indexes to be constructed on bos types. These operators compare first the timestamps and if those are equal, compare the values.

• Are the bounding boxes equal?

`{tbox, stbox} = {tbox, stbox}: boolean`

```SELECT tbox 'TBOX((1, 2012-01-01), (1, 2012-01-04))' =
tbox 'TBOX((2, 2012-01-03), (2, 2012-01-05))';
-- false
```
• Are the bounding boxes different?

`{tbox, stbox} <> {tbox, stbox}: boolean`

```SELECT tbox 'TBOX((1, 2012-01-01), (1, 2012-01-04))' <>
tbox 'TBOX((2, 2012-01-03), (2, 2012-01-05))'
-- true
```
• Is the first bounding box less than the second one?

`{tbox, stbox} < {tbox, stbox}: boolean`

```SELECT tbox 'TBOX((1, 2012-01-01), (1, 2012-01-04))' <
tbox 'TBOX((1, 2012-01-03), (2, 2012-01-05))'
-- true
```
• Is the first bounding box greater than the second one?

`{tbox, stbox} > {tbox, stbox}: boolean`

```SELECT tbox 'TBOX((1, 2012-01-03), (1, 2012-01-04))' >
tbox 'TBOX((1, 2012-01-01), (2, 2012-01-05))'
-- true
```
• Is the first bounding box less than or equal to the second one?

`{tbox, stbox} <= {tbox, stbox}: boolean`

```SELECT tbox 'TBOX((1, 2012-01-01), (1, 2012-01-04))' <=
tbox 'TBOX((2, 2012-01-03), (2, 2012-01-05))'
-- true
```
• Is the first bounding box greater than or equal to the second one?

`{tbox, stbox} >= {tbox, stbox}: boolean`

```SELECT tbox 'TBOX((1, 2012-01-01), (1, 2012-01-04))' >=
tbox 'TBOX((2, 2012-01-03), (2, 2012-01-05))'
-- false
```