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What does the colon sign : do in a SQL query? What does ":" stand for in a query? A bind variable Bind variables allow a single SQL statement (whether a query or DML) to be re-used many times, which helps security (by disallowing SQL injection attacks) and performance (by reducing the amount of parsing required) How does it fetch the desired value? Before a query (or DML) is executed by Oracle, your program will create a cursor Your
c++ faq - When do I use a dot, arrow, or double colon to refer to . . . The three distinct operators C++ uses to access the members of a class or class object, namely the double colon ::, the dot , and the arrow ->, are used for three different scenarios that are always well-defined Knowing this allows you to immediately know quite a lot about a and b just by looking at a::b, a b, or a->b, respectively, in any code you look at a::b is only used if b is a member
use of colon symbol in regular expression - Stack Overflow 1 A colon has no special meaning in Regular Expressions, it just matches a literal colon [\w]+: This just means any word character 1 or more times followed by a literal colon The brackets are actually not needed here Square brackets are used to define a group of characters to match So [abcd] means a single character of a, b, c, d
What is the meaning of prepended double colon - Stack Overflow The meaning of prepended :: - scope resulution operator - has been described in other answers, but I'd like to add why people are using it The meaning is "take name from global namespace, not anything else"
What does colon equal (:=) in Python mean? - Stack Overflow What does the := operand mean, more specifically for Python? Can someone explain how to read this snippet of code? node := root, cost = 0 frontier := priority queue containing node only explored :=