Question: [Joe Celko’s Personnel Problem Puzzle]Daren Race was trying to aggregate the results from an aggregate result set using Gupta’s SQLBase and could not think of any way other than

Question: [Joe Celko’s Consultants Puzzle]Brian K. Buckley posted a version of the following problem on the PowerSoft CompuServe forum in the WATCOM SQL section in 1994 November requesting assistance. He

Question: [Joe Celko’s Budget Versus Actual Puzzle]C. Conrad Cady posted a simple SQL problem on the CompuServe Gupta Forum. He has two tables, Budgeted and Actual, which describe how a

Question: [Joe Celko’s One In Ten Puzzle]Alan Flancman ran into a problem with some legacy system data that had been moved over to a SQL database. The table looked like

Question: Let’s say I have two tables, one with the columns PositionIDand SkillID and one with the columns EmployeeID and SkillID.If I do a SELECT SkillID FROM First_Table WHERE PositionID=7,I

Question: Is there a quick and dirty way to export a delimited datasetvia a simple query? I would like to get something like: value1,value2,value3(The delimeters could be commas, semi-colons, etc.)

Question: The Situation: I need to define some queries to extract data from an existing database (I am using MS Access 2.0). It consists of only two tables, from which

Question: What are the common uses of stored procedures? Answer: Many databases use stored procedures and/or triggers to implementreferential integrity [ensuring that data referenced by another tabledoesn’t get deleted or

Question: I’ve got a “new user” question for you. Some of the tables in our databaseshave several columns containing data that’s not used very often. When I’musing ad-hoc queries, it

Question: What are some of the new features of Power Objects Version 2? Answer: The major new features of Version 2.0 include:New platforms – OPO will continue to support both

Question: I want to let the user select more than one row in a repeater so my application can act on all of them at one time? Answer: A repeater

Question: When I open a session to my Oracle database, I can only see tables that are owned by my user name. How can I get to see other public

Question: I want to have a form that does not appear in a MDI (multiple document interface) frame. Can I do this? Answer: In Version 2 of Power Objects, you

Question: I want to use a string variable with the date in it (format would be 02/22/96). How do I accomplish this? Answer: You’ll need to first convert the date

Question: What is Embedded SQL, and howis it used with the C language? Answer: As the name implies, Embedded SQL describes SQL statements that are embedded in a host language.

Question: I need to query a database with outer joins on more thanone table, and am finding that my database doesn’t support it.Is there any way to work around the

Question: I am doing a select from a table where I want to combine two fields. Specifically, I have the StreetNumber andthe StreetName stored separately. I would like to beable

Question: When I insert a row into a table, the results from the query that come after the row don’t show up. If I re-fetch the results, I can get

Question: How can I set the flushing of rows to the database or the locking strategy used by Power Objects? Answer: Oracle Power Objects ‘supports’ two ways that rows can

Question: I can’t seem to clear the default menus in a modal dialog box. I have triedall types of code in the OpenModal() method, but the default menusstill appear. How

Question: I am using the Japanese version of OPO. Occasionally, I get an error messagethat says ‘Failed to lock row.’ It doesn’t happen all the time. What makesOPO lock a

Question: It seems like I cannot define my own data structures in OPO. I want to create an variable that actually consists of different underlying variables – a string followed

Question: I want to be able to start a section of code if nothing is happening in an application. This type of ‘null’ method is useful for default tasks. How

Question: I want to manipulate a check box in a repeater control, but the check box is not bound to any data column. How can I do this? Answer: Every

Question: I want to create a list box that will contain values based on the value ofanother list box. How can I accomplish this? Answer: A list box is populated

Question: I am using custom toolbars in my application. When I call the QBF form, ithas a default menu bar. How can I get rid of this? Answer: While the

Question: Our business is just starting to look at using a relational databasemanagement system. We are currently using computers, but the usershave their own copies of whatever data they need

Question: I want to be able to take an action when a user changes the value of a data field, but not when the value of the field is changed

Question: What are the major strengths of a RDBMS when compared to anODBMS? Answer: Most ODBMS today are still weak in the area of security, so if you are planning

Question: Under which circumstances should I consider an object database management system (ODBMS) instead of a relational database managementsystem (RDMBS)? Answer: There are some specific types of applications that are