Update Sync

INFO-3169 Databases 2/labs/Lab 4/Week 4 Lab 4 SQL Scripts.sql

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+CREATE TABLE test_customer (
+	Id NUMBER(6,0), 
+	Name VARCHAR2(20)
+);
+
+INSERT INTO test_Customer (Id, Name) VALUES (100,'SMITH');
+INSERT INTO test_Customer (Id, Name) VALUES (101,'JONES');
+INSERT INTO test_Customer (Id, Name) VALUES (100,'BROWN');
+
+SELECT * FROM test_customer;
+
+--TRUNCATE TABLE test_customer;
+DROP TABLE test_customer;
+
+CREATE TABLE test_customer (
+	Id NUMBER(6,0) PRIMARY KEY, 
+	Name VARCHAR2(20)
+);
+
+
+DROP TABLE IF EXISTS test_customer;
+
+CREATE TABLE test_customer (
+	Id NUMBER(6,0), 
+	Name VARCHAR2(20),
+	CONSTRAINT test_customer_Id_pk PRIMARY KEY (Id)
+);
+
+-- Viewing the Data Dictionary
+SELECT table_name, num_rows FROM USER_TABLES WHERE table_name != 'HTMLDB_PLAN_TABLE';
+
+-- Table Creation through Sub Queries
+CREATE TABLE cust_marketing AS
+	(SELECT Id, Lastname, FirstName, City, Province FROM Customers);
+
+SELECT * FROM cust_marketing;
+
+-- Modify Existing Tables
+ALTER TABLE Vendors ADD Ext NUMBER(4,0);
+
+ALTER TABLE VENDORS MODIFY Ext NUMBER(5,0);
+
+ALTER TABLE vendors DROP COLUMN Ext;
+
+
+
+SELECT table_name, num_rows FROM user_tables 
+WHERE table_name != 'HTMLDB_PLAN_TABLE';