Latest Answer: What's the Difference between COM and DCOM?Obviously, the difference is that DCOM is distributed but COM is not. To be more precise, there are three main elements added to COM: The way for creating a remote object. The way for accessing a remote object. ...
Latest Answer: Pro *C is a Oracle database pre-compiler. It acts as a database connectivity. We can also embed the SQL statement within C or C++ programming code which will execute successfully. ...
Latest Answer: null in c is some garbage value which cannot be predicted . If you are not intialising any value to the variable then null value is present in auto variables.null in oracle is used in sql queries for getting values whose values are null such as manger ...
Latest Answer: Of course Varchar2 is there to maintain variable length of columns. It keeps an internal pointer to maintain Variable length that means it wastes two bytes to keep first and last index where column starts and Calculates for each DML operation against ...
Latest Answer: Constraints are the conditions it can set while creating the table. To eliminate duplicates, not null values and also check the conditions..Triggers are used when the event occurs. ...
Latest Answer: The answer for this normalization is good. If u don't mine can u give me one more example for normalization. ...
Latest Answer: Logs increase rapidly when large amount of data are inserted/deleted/updated. when Commit/Rollback is issued. ...
Latest Answer: ther is Physical structure & Logical structurePhysical structure Consits of 3 files one or more data files two ...
Latest Answer: rownum is a pseudo column which is generated for query data set at runtime. while rowid is the physical address of the row and hence definition suggest rowid for a row will never change but row num will always change.Rowid has a physical significance ...
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