SQL Flashcards
DDL
Data Definition Language
Includes create database objects (table, index, view) and commands to define access rights
DML
Data Manipulation Language
Includes insert, update, delete, and retrieve.
Query
A SQL statement that must be executed (question or action)
Authentication
Process DBMS uses to verify that only registered users access the database
Schema
Logical group of database objects (tables and indexes) that are related to each other, usually belonging to a single user / application. Multiple schemas can be associated with a single database.
Reserved Words
Words by SQL to perform specific functions. They should not be used in column or table names.
Wildcard Character
Symbol used as a substitute for other characters or commands.
Subquery
Query embedded in another query. The innermost query is always executed first.
aka Nested Query / Inner Query
CRUD
Create Read Update Delete
Alias
Alternate name given to a table or column
Cascading Order Sequence
Multilevel ordered sequence
View
Virtual table based on a SELECT query
Base Table
Table that a view is based on
Batch Update Routine
Multiple transactions pooled into a single batch to update a master table
Updatable View
Can be used to update attributes in any base table(s) used in the view