![]() ![]() ![]() Put the branch digits in the same column as the account number digits.Ĭreate one sequence per branch where you specify a unique range for each, defined by the sequence's MINVALUE and MAXVALUE.įor display purposes, you can decode into sort code and account number by using generated columns.īasic example code for sequences CREATE SEQUENCE seq_branch_1Īt the time of creating an account you presumably know which branch it's for, so: INSERT INTO account(customer_id, account_type_id. The first two digits of the sort code identifies the bank and will always be the same, so you don't need to store these. Use MariaDB sequences to generate unique numbers - assuming it's OK that the numbers are created sequentially.Īssuming you are designing a system for one particular bank, and the digits in the sort code are used to identify the bank and branch, then: Let us first create a table mysql> create table DemoTable ( Value int ) Query OK, 0 rows affected (0. There are probably more than one way to do this, but here is one idea. To insert random numbers, use RAND () function from MySQL. There’s no built-in way to generate a random string in MySQL, so you need to create a workaround using the provided functions. Is it possible to make a trigger to do this in MySQL/mariadb? And sort code should have this format "XX-XX-XX" where the X's numbers and this should also be checked to be unique. The account number should just be a unique 8 digit, however, the first 3 digits will contain the id of branch_id from a separate branch table, e.g an account belonging to branch_id 700 should have an account number starting with 700. Generated columns allow you to store automatically generated data in a table without using the INSERT and UPDATE clauses. However, I want to know if there is a way to create a trigger that upon inserting into this table a unique sort_code and account_number can be generated. Tip: Consider using variables when you need to use the same random string several times (e.g. )ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 Opening_balance DECIMAL(10,2) NOT NULL DEFAULT 51, It can scan the list of tables and fields of a MySQL database and generate SQL INSERT. I have an account table which is laid out in 3NF: CREATE TABLE account ( This class can be used to populate a MySQL database with random data.
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