select count of distinct values sql
SELECT COUNT (DISTINCT column-name) FROM table-nameselect count of distinct values sql
SELECT COUNT (DISTINCT column-name) FROM table-nameselect distinct
SELECT DISTINCT ma_colonne
FROM nom_du_tableauhow to select unique element in sql
DISTINCT
- select distinct * from employees; ==>
retrieves any row if it has at
least a single unique column.
- select distinct first_name from employees; ==>
retrieves unique names
from table. (removes duplicates)
- select distinct count(*) from employees;
retrieve number of unique rows
if any row has at least a single unique data.distinct sql
Distinct: helps to displays the non duplicate
records when retrieving the records from a table.
SELECT DISTINCT FIRST_NAME FROM VISITORS;unique element in sql
DISTINCT
- select distinct * from employees; ==> retrieves any row if it has at
least a single unique column.
- select distinct first_name from employees; ==> retrieves unique names
from table. (removes duplicates)
- select distinct count(*) from employees; retrieve number of unique rows
if any row has at least a single unique data.Copyright © 2021 Codeinu
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