Update README.md

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GowthamRaj K
2021-07-28 17:36:15 +05:30
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@@ -466,8 +466,7 @@ Following are some of the most commonly used constraints available in SQL
### OR
- The OR operator is used to combine multiple conditions in an SQL statement's WHERE clause.
### IS NULL
The NULL operator is used to compare a value with a NULL value.
- The NULL operator is used to compare a value with a NULL value.
11
UNIQUE