The below example states that to create an extension of UUID-OSSP is as follows.ĬREATE EXTENSION IF NOT EXISTS "uuid-ossp".To use the UUID function, we need to create an extension of UUID-OSSP in PostgreSQL.How does UUID data type work in PostgreSQL? To use this function, we need to create an extension of UUID-OSSP in PostgreSQL. We can generate a UUID number by using this function. uuid_generate_v4 – This is defined as generating UUID numbers using only random numbers.uuid_generate_v1 – This is defined as a generated UUID number using a combination of the computer’s Mac address, the current timestamp, and any random number.We can select a value of uuid_generate_v1 and uuid_generate_v4 data type functions by using a select statement. Select – Select is used to select the UUID data type in PostgreSQL.Primary key – We have created a primary key on the UUID column while creating a new table, we can also create a primary key later in the column. Data type – We can define different data types for the different columns while creating a table.Create – Create a keyword used to create a new table using a UUID data type on the column.We can create a UUID data type on the column. Table name – The table name creates a new table using a UUID data type on the column.We can create a UUID data type on the column using the uuid_generate_v1 and uuid_generate_v4 functions. Column 1 to column N – Column 1 to column N, used in the table on which we created a UUID data type in PostgreSQL.SELECT uuid_generate_v4 () (Generating UUID by using only random numbers.) īelow is the parameter description of the above syntax. SELECT uuid_generate_v1() (Generating UUID using a combination of MAC address of Computer, timestamp, and random value) ģ. CREATE TABLE table_name(Ĭolumn_name uuid DEFAULT uuid_generate_v4(),Ģ. Syntax of creating a table using data type. Below is the syntax of the data type as follows.ġ.
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