This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Hi List People, I'm starting an app which I would like to make database-independent, e.g. so that it can work on Oracle or mySQL. I would like to have one schema that works on both, no stored procedures and, well that's challenging enough. My first issue: primary keys I'll have an extra helper table (last_key_used) to store the last primary key used in each table. When I insert a new row in a normal table, I'll do this: get last value from last_key_used table increment it update last_key_used table with incremented value use the incremented value for the primary key in my new row I want to try transactions - so that I can place the whole operation in a transaction - and alternatively I want to try just table locking. But I don't know how to do either in Java. Can anybody give me a pointer for transactions? Also any ideas how I could use table-locking, i.e. how do I get 4 SQL statements to execute in one block and return a value? (LOCK TABLE; SELECT; increment the value; UPDATE; UNLOCK;) Thanks! Adam
I have seen things you people would not believe, attack ships on fire off the shoulder of Orion, c-beams sparkling in the dark near the Tennhauser Gate. All these moments will be lost in time, like tears in the rain.