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Fun MySQL fact of the day: all-or-something?

Finally, A. The A in ACID stands for Atomicity, which is the property that guarantees that a series of database operations performed in a transaction all occur or nothing occurs. You might be thinking, "if Atomicity is the first letter in ACID, why did you save it for last"? I ... read more

Fun MySQL fact of the day: a CHECKered past

A Check Constraint is a table constraint, described in SQL-89, that allows a database index to remain consistent based on a specified search criteria or expression. For example, we could ADD CONSTRAINT is_even_ck CHECK(my_int_col % 2 = 0) to ensure that the value of the my_int_col column in every row is ... read more

Fun MySQL fact of the day: no nested transactions

Nested transactions allow a client to begin and end multiple transactions within an outer transaction (within an outer transaction (within an outer transaction (within an outer transaction ...))). When would you use it? This type of mechanism is necessary to accomplish a pure Component Based Architecture. However, excepting BerkleyDB, nearly no ... read more
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