UPD operators table

Author: francerz

README.md

@@ -244,25 +244,20 @@ prefixes the `and` and `or` logical operators for clarity.
 
 | SQL Operator  | Regular (AND)                 | AND                              | OR                              |
 | ------------- | ----------------------------- | -------------------------------- | ------------------------------- |
-| Comparison    |                               |                                  |                                 |
 | `=`           | `equals($op1, $op2)`          | `andEquals($op1, $op2)`          | `orEquals($op1, $op2)`          |
 | `<>` or `!=`  | `notEquals($op1, $op2)`       | `andNotEquals($op1, $op2)`       | `orNotEquals($op1, $op2)`       |
 | `<`           | `lessThan($op1, $op2)`        | `andLessThan($op1, $op2)`        | `orLessthan($op1, $op2)`        |
 | `<=`          | `lessEquals($op1, $op2)`      | `andLessEquals($op1, $op2)`      | `orLessEquals($op1, $op2)`      |
 | `>`           | `greaterThan($op1, $op2)`     | `andGreaterThan($op1, $op2)`     | `orGreaterThan($op1, $op2)`     |
 | `>=`          | `greaterEquals($op1, $op2)`   | `andGreaterEquals($op1, $op2)`   | `orGreaterEquals($op1, $op2)`   |
-| Pattern Match |                               |                                  |                                 |
 | `LIKE`        | `like($op1, $pattern)`        | `andLike($op1, $pattern)`        | `orLike($op1, $pattern)`        |
 | `NOT LIKE`    | `notLike($op1, $pattern)`     | `andNotLike($op1, $pattern)`     | `orNotLike($op1, $pattern)`     |
 | `REGEXP`      | `regexp($op1, $pattern)`      | `andRegexp($op1, $pattern)`      | `orRegexp($op1, $pattern)`      |
 | `NOT REGEXP`  | `notRegexp($op1, $pattern)`   | `andNotRegexp($op1, $pattern)`   | `orNotRegexp($op1, $pattern)`   |
-| Nullability   |                               |                                  |                                 |
 | `IS NULL`     | `null($op)`                   | `andNull($op)`                   | `orNull($op)`                   |
 | `IS NOT NULL` | `notNull($op)`                | `andNotNull($op)`                | `orNotNull($op)`                |
-| Range         |                               |                                  |                                 |
 | `BETWEEN`     | `between($op, $min, $max)`    | `andBetween($op, $min, $max)`    | `orBetween($op, $min, $max)`    |
 | `NOT BETWEEN` | `notBetween($op, $min, $max)` | `andNotBetween($op, $min, $max)` | `orNotBetween($op, $min, $max)` |
-| Membership    |                               |                                  |                                 |
 | `IN`          | `in($op, $array)`             | `andIn($op, $array)`             | `orIn($op, $array)`             |
 | `NOT IN`      | `notIn($op, $array)`          | `andNotIn($op, $array)`          | `orNotIn($op, $array)`          |