Why can’t you code the alias balance in the where clause of the sql statement. you can, but the person writing this stored procedure did not realize this because if you did, you would get a syntax error you can, but this is considered cleaner coding technique because if you did, the compiler would get confused between it and the name @balancemin,

*write a program that defines symbolic names for several string literals (chars between quotes). * use each symbolic name in a variable definition. * use of symbolic to compose the assembly code instruction set can perform vara = (vara - varb) + (varc - vard); ensure that variable is in unsigned integer data type. * you should also further enhance your symbolic logic block to to perform expression by introducing addition substitution rule. vara = (vara+varb) - (varc+vard).