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

9 votes147 views3 answers
Import DB through mysql console
SQL
0 vote138 views2 answers
Python mysql create table if not exists
SQL
0 vote137 views2 answers
Connect to mysql server mac terminal
SQL
0 vote118 views1 answer
Sub blocks in sql
SQL
1 vote130 views1 answer
How to select all attributes from a row if there is a certain string in it MySQL
SQL
1 vote118 views1 answer
How to delete data from sql database in android
SQL
3 votes131 views1 answer
How to check schema privileges in oracle
SQL
12 votes142 views6 answers
Select distinct
SQL
0 vote153 views1 answer
MySQL get all previous date record
SQL
7 votes149 views2 answers
Postgres concat
SQL