Constraint sql

create table etc(
  numeric (4) anything constraint Gives_name_to_a_restriction primary key);

Sql constarint

It creates a new constraint on an existing table, which is used to specify
rules for any data in the table.
Example: Adds a new PRIMARY KEY constraint named ‘user’ on columns
ID and SURNAME.
ALTER TABLE users
ADD CONSTRAINT user PRIMARY KEY (ID, SURNAME);

Constraint

print("hello world");
alert(print);

-1

Similar codes

0 vote368 views2 answers
Insert data mysql with cmd
SQL
24 votes336 views4 answers
Postgres remove database
SQL
0 vote335 views1 answer
Select in select sql
SQL
2 votes318 views2 answers
Postgres set user as superuser
SQL
11 votes350 views3 answers
Pl sql example
SQL
0 vote338 views1 answer
Mysql date time string format for marshmellow field schema
SQL
0 vote339 views1 answer
Fetcht he leftmost word in a comma separated string in sql
SQL
0 vote350 views1 answer
Oracle sql copy table without data
SQL
2 votes346 views3 answers
Current setting postgres timezone
SQL
2 votes332 views1 answer
Oracle calculated column
SQL