primary_key sql

/* A primary key allows each record in a table to be uniquely identified. There can only be one primary key per table, and you can assign this constraint to any single or combination of columns. However, this means each value within this column(s) must be unique. Typically in a table, the primary key is an ID column, and is usually paired with the AUTO_ INCREMENT keyword. This means the value increases automatically as new records are created. */ CREATE TABLE stats(id INT NOT NULL PRIMARY KEY, name TEXT)

sql primary key

-- NOTE: this is for SQL-Oracle specifically

-- example:
SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner
FROM all_constraints cons, all_cons_columns cols
WHERE cols.table_name = 'CUSTOMERS' 
AND cons.constraint_type = 'P'
AND cons.constraint_name = cols.constraint_name
AND cons.owner = cols.owner;

-- syntax:
SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner
FROM all_constraints cons, all_cons_columns cols
WHERE cols.table_name = '<table-name>' -- Replace <table-name> with your table-name
AND cons.constraint_type = 'P'
AND cons.constraint_name = cols.constraint_name
AND cons.owner = cols.owner;

Posted by: Guest on April-28-2020

Code answers related to "primary_key sql"

Browse Popular Code Answers by Language

Answers for "primary_key sql"

Code answers related to "primary_key sql"

Code answers related to "SQL"

Browse Popular Code Answers by Language

Popular Programming Languages

Advertisements

Company

Compilers

Help

Connect with us