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GowthamRaj K
2021-07-28 17:37:52 +05:30
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@@ -469,3 +469,5 @@ Following are some of the most commonly used constraints available in SQL −
- The NULL operator is used to compare a value with a NULL value.
### UNIQUE
- The UNIQUE operator searches every row of a specified table for uniqueness (no duplicates).
# SQL - Expressions ✍