It typically takes 2â3 business week to get a Canadian visitor visa. It is a two step process: Apply online on CIC website by filling up forms, uploading supporting documents and paying the fees. Within next 1-3 weeks, CIC will evaluate your application details and make a decision.
Document, Discover and Interoperate. The Data Documentation Initiative (DDI) is an international standard for describing the data produced by surveys and other observational methods in the social, behavioral, economic, and health sciences.
up vote 53 down vote. DDL is Data Definition Language: it is used to define data structures. For example, with SQL, it would be instructions such as create table, alter table, ... DML is Data Manipulation Language: it is used to manipulate data itself. For example, with SQL, it would be instructions such as insert, update, delete, ...