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ORACLEDISTINCT
Oracle's distinct usage can filter duplicate rows in the result set to ensure that the value of the specified column or columns returned in the "SELECT" clause is unique. The syntax is "SELECT DISTINCT column 1, column 2, column 3... from table name". "distinct" will sort the returned result set and can be used in conjunction with "order by" to improve efficiency.
What is the usage of oracle distinctOracle's distinct usage can filter duplicate rows in the result set to ensure that the value of the specified column or columns returned in the "SELECT" clause is unique. The syntax is "SELECT DISTINCT column 1, column 2, column 3... from table name". "distinct" will sort the returned result set and can be used in conjunction with "order by" to improve efficiency.
How to use mysql distinctIn mysql, the distinct keyword is used to filter duplicate data. It can filter duplicate data in one or more fields in the data table and only return one piece of data to the user; the distinct keyword needs to be used together with the SELECT statement. The syntax "SELECT DISTINCT column1, column2, ... FROM table_name;".
How to use MySQL DISTINCT clause on multiple columns?We can use DISTINCT clause on multiple columns in MySQL. In this case, the uniqueness of a row in the result set will depend on the combination of all columns. Example Consider the following table "testing" with 10 rows -mysql>select*fromtesting;+------+---------+---------+|id |fname | Lname |+------+----------+----------+| 200|Raman |Kumar&nbs
How can we use MySQL DISTINCT clause with WHERE and LIMIT clause?By using the WHERE clause with the DISTINCT clause in a MySQL query, we set a condition based on which MySQL returns the unique rows of the result set. By using the LIMIT clause and the DISTINCT clause in a MySQL query, we actually provide the server with a range on the maximum number of unique rows to be returned in the result set. Example We can use WHERE and LIMIT clauses with DISTINCT on the table named "testing" as shown below -mysql>Select*fromtesting;+------+--------- +---------+|id&nbs
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