Creating and Executing a Variable as a Query
Question: How do I create a stored procedure that will construct and execute a query from its parameters? At the heart I’d imagine something like this, for simplicity’s sake: declare
Question: How do I create a stored procedure that will construct and execute a query from its parameters? At the heart I’d imagine something like this, for simplicity’s sake: declare
Question: I have a database with a DateTime field of the following structure 1974-01-18T00:00:00′. How do I query it so that I can extract the dates with a particular day
Question: How do I create a text field of greater than 8,000 characters (in v7.0)? I attempted to use the “text” data type, but my code returned an error saying
Question: I’m trying to store text that’s in an RTF format using the TextRTF property of VB’s RichTextBox control. What type of field do I have to use in my
Question: I have two similar tables with monthly data: one holds current year data and the other holds prior year data. How do I combine them to create a rolling
Question: How do I convert a number that represents a date into a date field? The number’s format is CCYYMMDD. Answer: Fortunately, the format of your numeric value doesn’t need
Const INTERNET_OPEN_TYPE_PRECONFIG = 0Const INTERNET_FLAG_EXISTING_CONNECT = &H20000000Private Declare Function InternetOpen Lib “wininet.dll” Alias “InternetOpenA” _ (ByVal lpszAgent As String, ByVal dwAccessType As Long, _ ByVal lpszProxyName As String, ByVal lpszProxyBypass
Question: Can I auto start full text index? Answer: Although Enterprise Manager doesn’t provide the option, you can set this service to start automatically by using the services icon in
Question: Is there a non-platform-specific SQL way of determining what data type a given field is? Answer: That information is specific to each database. Every product stores its meta data
Question: Can I use a user-defined data type when defining a temporary table in a stored procedure? Answer: You can use user-defined data types in temporary tables, but remember one
To rename a file, use the standard function rename() (declared in ). This function takes two arguments of type const char *, the first of which is the old name
The standard function remove() deletes a file. It takes one argument of type const char * which is the name of the file to be deleted. You can provide a
The Standard Template Library defines five major categories of iterators. The following diagram illustrates these categories:input iterators output iterators / forward iterators | bidirectional iterators | random access iteratorsNote that
Question: How can I make a function to return and display the maximum number in the following array: int my_array[]={10,3,35,101,65,100}; Answer: First, sort the array. Then display the last element
Question: I understand that most of the time, new and malloc may use the same allocation routines, but does that necessarily mean new calls malloc? I am asking because I
Question: I have data in a Vector and need to sort it before displaying iton the screen; how do I do this? Answer: The Java 2 Collections Framework provides a
Question: What is the advantage of declaring a variable as a superclass referenceand then pointing that variable to an instance of a subclass? Theway I see it, I can achieve
Question: Can RMIC make stubs for inner classes? When I tryrmic packagename.OuterClassName$InnerClassName, it doesn’t work. Answer: Yes, RMIC can make stubs for inner classes. However, you must use thefully qualified
Question: Is there a way to access the call stack debugging information from the code? I would like to print the call stack inside a function, each time it is
This repair and compact also backs up the Access MDB. Function ValidateMdb(MDB As String) As Boolean This function repairs, compacts, and backs up a database fileand deletes stray LDB (locking
Oracle 8i introduces the concept of temp tables. This feature long since enjoyed by SQL Server developers enables data to be visible on a Session orTransaction basis. To create an
Everyone can deal with one recordset easily. However, if a SQL statement is like this: “SELECT a, b FROM Table1 COMPUTER SUM(a), SUM(b),” looping though the recordset will not return
To change the case of all the letters in a string object, use the std::transform() algorithm. This algorithm is defined in the standard header . It takes four arguments. The
Many programmers append the endl manipulator after each cout expression, as in: cout
The standard streams cin and cout are automatically tied to each other. This means that whenever you’re using both of them, C++ ensures that their operation is synchronized. In other
The standard stream objects support all built-in types as well as several classes of the Standard Library, e.g., std::string. If you’re using complex arithmetic, you’d be pleased to hear that
Classes having a non-virtual destructor aren’t meant to be derived from (such classes are usually known as “concrete classes”). std::string, std::complex, and all STL containers are concrete classes. Why is
Question: How can I release all existing database locks for all the sessions a specific user has started? Answer: The easiest way probably is to log that user out. Otherwise,
Question: I have been receiving the following (albeit general) error sporadically: “Microsoft OLE DB Provider for ODBC Driverserror ‘80004005’ [Informix][Informix ODBC Driver]General error.” This error has occurred when the code
Question: I have a parameterized SQL statement like the following: “insert into eSession (ESessionID, eUserName, eLastActivityTime) VALUES(?,?,?)” It’s parameters are ‘bbb’,’name’ and ‘2000/01/01 22:23:25′, using an ODBC connection. I can’t