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 votes404 views2 answers
Oracle trigger
SQL
2 votes388 views1 answer
Q operator in oracle
SQL
0 vote351 views1 answer
Turnicate in mysql
SQL
2 votes356 views1 answer
Change primary key sql
SQL
0 vote436 views1 answer
Mysql show schema
SQL
11 votes354 views1 answer
Mysql text type max length
SQL
0 vote356 views1 answer
How to user id to show in from date to upto date in mssql server
SQL
1 vote379 views1 answer
Sql current timestamp
SQL
0 vote368 views1 answer
Insert overwrite table in mysql in nifi
SQL
2 votes398 views2 answers
Mysql write into table
SQL