PL/SQL syntax BASICS (2)

Basic PL/SQL syntax (2) identifier is the name of a PL/SQL object, which generally includes constants or variables, cursors, reserved words, exceptions, processes, functions, triggers, etc. Generally, www.2cto.com identifiers must comply with the rules: the maximum length is 30 characters, must start with a letter, can have ($, _, #) symbols, cannot have space characters valid characters: name, age, stu123, s _ # $, invalid character: 23 name does not start with a letter. There is a space in the stu name. stu % name has an invalid character % mark comment Syntax: www.2cto.com single line comment --
Multi-line comment/**/Two Methods for assigning values to variables: Use the value assignment statement: = www.2cto.com using the select into statement example: