Sometimes the deadline is yesterday or sometimes your boss wants the change now. Maybe the clients have an important feature that he thought he could do without dev but realised one day before the big marketing splash what he wanted to do is not working. These changes are easy, no problem. I will do it […]
A old process we had was fetching a list from a query for each player one by one, and adding it in a excel file with other data needed on the player. Seeing that process was slow, we decided to turn it into a query. If we take a close look at the model we […]
My god sometime I bang my head on the wall to do something simple on oracle. So oracle don’t support limit so to do something simple has : SELECT f_name, l_name, age from employee_data ORDER BY age DESC LIMIT 20 become : SELECT f_name, l_name, age FROM ( SELECT f_name, l_name, age, ROWNUM r FROM […]
I was trying to update a table that using sql join but I kept getting ORA-00933 I tried the following: Using A SQL JOIN In A SQL UPDATE Statement Using A SQL JOIN In A SQL UPDATE Statement (www.bennadel.com) update table using inner join (venushuynh.wordpress.com) but I kept getting the ORA-00933 then tried this Oracle […]
Another problem I’ve it recently with saveOrUpdate that can be fix by using the same saveOrUpdate but give the class name. Using the session.saveOrUpdate(myObject) might give you a unknown entity while using the same method with the class name in parameter won’t. session.saveOrUpdate(myObject); //give a unknown entity session.saveOrUpdate(“MyObjectClassName”, MyObject); //Work The important difference between the […]
For some reason Oracle have no Boolean Since there is no BOOLEAN datatype in Oracle, as far as tables are concerned. CREATE TABLE BooleanTable (MyBool BOOLEAN); return : ORA-00902: invalid datatype But there is a BOOLEAN datatype in PL/SQL. What should we do instead? According to Tom at ThinkOracle you could create the table using […]
When you are handling string you sometime have single quote in your string. I was looking on how to handle that in Oracle and it’s not pretty but you can cover that case with the chr(39) function, 39 being the code for the single quote. So it you are looking the “it’s” you have to […]
I had in the past had to work with oracle and had to convert it to mysql. Unfortunately (or fortunately) that project was cancel but here are the bit of information I’ve found that I didn’t know about and made me lost a lot of time. Oracle vs mySQL datatype edition From mySQL […]
The to_date function we talked earlier make a come back. The wrong way to do it is : SELECT field 1, field2, date_and_time, FROM table1 WHERE date_and_time = ’12-04-27′ you end up comparing string in that case to work you need to do the following: SELECT field 1, field2, date_and_time, FROM table1 WHERE date_and_time = […]
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