Oracle Convert Number To Char

Oracle Convert Number To Char FAQ

What is the difference between varchar and varchar2 in oracle?

VARCHAR is ANSI standard but takes up space whereas VARCHAR2 is Oracle-only but makes more efficient use of space. VARCHAR2 does not distinguish between a NULL and empty string, and never will.

Can i convert a string to a char?

To be strictly pedantic, you cannot "convert a std::string into a char* or char data type.". As the other answers have shown, you can copy the content of the std::string to a char array, or make a const char* to the content of the std::string so that you can access it in a "C style".

How to check table exists in oracle?

Answer: There are a few ways to verify whether a table exists within Oracle. Another is to select the first row to check that the table exists (hey it may have millions of rows!): At bare minimum, you will get a response of "0 rows selected" which means the table exists, but there is no data in the table.

What is numeric in oracle?

The numeric data type is the super data type in numeric data types and it is an internal data type that means oracle internally performs the mathematical operation. The performance of numeric data types is slower but it is extremely portable.