The Web SQL Database standard never saw the light of day. It was first formulated, then deprecated by the W3C and was only implemented in some
browsers. (It is not supported in Firefox or IE.)
Further, the use of a Web SQL Database poses security concerns, since you only need its name to access such a database.
Noncompliant Code Example
var db = window.openDatabase("myDb", "1.0", "Personal secrets stored here", 2*1024*1024); // Noncompliant
This rule is deprecated, and will eventually be removed.