Sql unique select

Sql unique rows

SELECT
DISTINCT country
FROM City;

Source: learnsql.com

Sql insert for each distinct value

insert into your_table (col1, col2, col3)
select distinct col1, 'newval', col3
from your_table

Source: stackoverflow.com

Unique in sql server

CREATE TABLE Persons (
    ID int NOT NULL UNIQUE,
    LastName varchar(255) NOT NULL,
    FirstName varchar(255),
    Age int
);

How 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.

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.

Sql unique select

SELECT DISTINCT col1, col2, ....
FROM table_name;

SELECT col1, MIN(col2)
FROM table_name
GROUP BY col1;

Similar codes

6 votes182 views2 answers
How to get yesterday date in mysql
SQL
0 vote155 views1 answer
Get current date data in mysql
SQL
0 vote176 views1 answer
Search In the Data using ObjectName
SQL
0 vote147 views1 answer
Mysql undo delete
SQL
0 vote183 views2 answers
Oracle ora-00054 how to unlock
SQL
0 vote159 views1 answer
Sqlplus change user
SQL
0 vote174 views1 answer
Get relation data in mysql using query to excel
SQL
3 votes158 views1 answer
Sql insert inserted id
SQL
0 vote162 views1 answer
Sql find gaps in date ranges
SQL
1 vote342 views1 answer
Postgres upgrade to superuser
SQL