Be aware that the (2) on INT(2) means nothing it still takes 4 bytes. MySQL has a UUID() function, which makes MySQL generate a UUID value and return it in a human-readable form, of type VARCHAR(36). Here, We will use UUID and UUIDTOBIN() functions to assign the value in OrderId Column. Say we have a table of users, and each user has a UUID. CREATE TABLE OrderDetails( OrderId BINARY(16) PRIMARY KEY, ProductName VARCHAR(100) NOT NULL, Price DECIMAL(10, 2) NOT NULL, ExpectedDelivery DATE NOT NULL ) Now, inserting data into OrderDetails table. Related: Don't blindly use BIGINT for all numbers. See also follow up post called Mysql 8.0: UUID support, which explains the 8.0 solution. And, if using utf8, that is 755 bytes for every row! (8.0 fixes this design flaw?) sisve i think mysql encourage to store 128 bit data in binary, mysql have no support for ipv6 but it have function to convert ipv6 to binary and vice versa the same as with uuid, because mysql has function to convert binary to uuid so i think mysql recommend storing uuid in binary, no need for native data type if it can do the same just with. In this case, VARCHAR(255) becomes CHAR(255) for the temp table. Solutions Of course there are some best practices that MySQL users can follow to avoid those problems: use a smaller datatype to store their UUIDs: BINARY (16) store the UUIDs sequentially: use UUIDTOBIN (. ![]()
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