Predicates boil down to either a TRUE or a FALSE result. You can filter out unwanted rows from the result of an SQL query by applying a WHERE clause whose predicate excludes the unwanted rows.
| = | Equal |
| <> | Not equal |
| < | Less than |
| <= | Less than or equal |
| > | Greater than |
| >= | Greater than or equal |
| ALL | BETWEEN |
| DISTINCT | EXISTS |
| IN | LIKE |
| MATCH | NOT IN |
| NOT LIKE | NULL |
| OVERLAPS | SIMILAR |
| SOME, ANY | UNIQUE |
| ALL | BETWEEN |
| DISTINCT | EXISTS |
| IN | LIKE |
| MATCH | NOT IN |
| NOT LIKE | NULL |
| OVERLAPS | SIMILAR |
| SOME, ANY | UNIQUE |
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Source:http://www.dummies.com/how-to/content/sql-where-clause-predicates.html
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