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

0 vote186 views2 answers
Disallowed function mysql to_date()
SQL
1 vote192 views1 answer
How to unlock table in mysql
SQL
1 vote245 views1 answer
Postgres set sequence value to max id
SQL
8 votes224 views4 answers
Postgresql server restart
SQL
0 vote247 views1 answer
TSQL Find csv file in folder
SQL
0 vote177 views1 answer
Sqlite closes value
SQL
4 votes274 views2 answers
Convert utc to est sql
SQL
-1 vote182 views1 answer
Sql syntax create timestamp column
SQL
1 vote244 views1 answer
Psql connect
SQL
47 votes283 views6 answers
Add column mysql
SQL