What is the difference between distinct and all in SQL?

Unique was the old syntax while Distinct is the new syntax,which is now the Standard sql. Unique creates a constraint that all values to be inserted must be different from the others. Distinct results in the removal of the duplicate rows while retrieving data.

What is distinct SQL?

The SQL SELECT DISTINCT Statement The SELECT DISTINCT statement is used to return only distinct (different) values. Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values.

Is it count distinct or distinct count?

The correct syntax for using COUNT(DISTINCT) is: SELECT COUNT(DISTINCT Column1) FROM Table; The distinct count will be based off the column in parenthesis.

What is difference between distinct?

Ask The Editor | Learner’s Dictionary. Both words are adjectives that mean something is different, but they are not used in the same ways. Distinct usually means “noticeably different” or “separate.” Distinct is used when you want to say that something is obviously separate or different from other things.

Can we create trigger on view?

Triggers may be created on views, as well as ordinary tables, by specifying INSTEAD OF in the CREATE TRIGGER statement. If one or more ON INSERT, ON DELETE or ON UPDATE triggers are defined on a view, then it is not an error to execute an INSERT, DELETE or UPDATE statement on the view, respectively.

Does count distinct count nulls?

If the COUNT DISTINCT function encounters NULL values, it ignores them unless every value in the specified column is NULL. If every column value is NULL, the COUNT DISTINCT function returns zero (0).

Why do we create triggers in SQL?

Because a trigger resides in the database and anyone who has the required privilege can use it, a trigger lets you write a set of SQL statements that multiple applications can use. It lets you avoid redundant code when multiple programs need to perform the same database operation.

What is the difference between distinct and distinctive?

The difference between Distinct and Distinctive. When used as adjectives, distinct means capable of being perceived very clearly, whereas distinctive means distinguishing, used to or enabling the distinguishing of some thing.

What is the definition of distinct in math?

Distinct (mathematics) In mathematics, two things are called distinct if they are not equal. In physics two things are distinct if they cannot be mapped to each other.

What does distinctness mean?

• DISTINCTNESS (noun) The noun DISTINCTNESS has 3 senses: 1. the quality of being sharp and clear. 2. the state of being several and distinct. 3. the quality of being not alike; being distinct or different from that otherwise experienced or known.

What is the definition of distinct?

Definition of distinct. 1 : distinguishable to the eye or mind as being discrete (see discrete sense 1) or not the same : separate a distinct cultural group teaching as distinct from research.