Specify CONSTRAINT : CONSTRAINT « Constraints « PostgreSQL

1. PostgreSQL
2. Constraints
3. CONSTRAINT

Specify CONSTRAINT

postgres=#
postgres=# CREATE TABLE products (
postgres(#    product_no integer,
postgres(#    name text,
postgres(#    price numeric,
postgres(#    CHECK (price > 0),
postgres(#    discounted_price numeric,
postgres(#    CHECK (discounted_price > 0),
postgres(#    CONSTRAINT valid_discount CHECK (price > discounted_price)
postgres(# );
CREATE TABLE
postgres=#
postgres=# drop table products;
DROP TABLE
postgres=#
           
       

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