Query String is used to send the values from one webpage to other page.

The format of query string as follows

http://www.xyz.com/address.html?name=james %20 address=uk

The above query string sends the value name=james and address=uk to the address.html page.

Query strings online are used for searching information on the internet. When a person enters a a topic to research, the website a person is asking the information on will change the information into a query string to find the information for the person inquiring about.

Text String

There is no limitation for the POST method but for the GET method it is 256 characters

Query by Example (QBE) is a database query language for relational databases. A QBE parser parses the search query and looks for the keywords. A more formal query string, in languages such as SQL, is then generated, which is finally executed. However, when compared with a formal query, the results in the QBE system will be more variable.

SQL (Structured Query Language) SQL is a set-based, declarative query language, not an imperative language such as C or BASIC. However, there are extensions to Standard SQL which add procedural programming language functionality, such as control-of-flow constructs