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 vote143 views1 answer
Procedures and functions in pl/sql
SQL
0 vote193 views1 answer
Databricks install odbc driver connect to sql server
SQL
0 vote206 views2 answers
Insert data mysql with cmd
SQL
16 votes208 views3 answers
Get count of duplicate records
SQL
12 votes325 views2 answers
Find duplicates mysql column
SQL
13 votes176 views2 answers
Mysql order by multiple columns
SQL
25 votes193 views6 answers
Import mysql database command line
SQL
0 vote191 views1 answer
Alter table add check constraint oracle
SQL
0 vote189 views2 answers
Oracle sql for each row
SQL
0 vote173 views1 answer
How to execute stored output to csv files
SQL