欧美福利在线播放_免费在线观看羞羞视频_加勒比色老久久爱综合网_性一交一乱一区二区洋洋av_国产麻豆麻豆_国产精品一线天粉嫩av_国产精品天美传媒入口_午夜a一级毛片亚洲欧洲_精品久久久久久久大神国产_四虎影视在线播放

   SQL in Microsoft Access培訓

RDBMS (Relational DataBase Management System)
Relational Operators
SQL as Declarative Language
SQL Syntax
SQL Sublanguages DQL, DML, DDL, DCL
DQL (Data Query Language) in Detail
SELECT clause
Column aliases
Table aliases
Date types and Date functions
Group function
Table joins
JOIN clause
UNION operator
Nested queries
Correlated subqueries
DML (Data Manipulation Language) Overview
Inserting rows (INSERT)
Inserting rows using subquery
Updating rows (UPDATE)
Deleting rows (DELETE)
DDL (Data Definition Language) Overview
Creating, altering and dropping objects (CREATE, ALTER, DROP)
Creating tables using subquery (CREATE TABLE .... AS SELECT...)
CONSTRAINTS Overview
NULL i NOT NULL
CONSTRAINT clause
ENUM type
SET type
PRIMARY KEY
UNIQUE
FOREIGN KEY
DEFAULT clause
Transactions Overview
COMMIT
ROLLBACK
SAVEPOINT
Implicit and explicit rollbacks and commits
SQL Dialects Overview
MySQL
Microsoft Access and SQL Server
Oracle and PostgreSQL