When writing a SQL SELECT from two different tables, do the tables in the SQL need...
- When writing a SQL SELECT from two different tables, do the tables in the SQL need to be joined by primary/foreign key(s)?
Homework Answers
No.. Not always required we can join the 2 different tables with any column if they has same data type.
Here the only condition is joining columns must be of same type
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When writing a SQL SELECT from two different tables, do the
tables in the SQL need...
use SQL to answer the question. Create two tables and insert atleast 7 or 8 values（whatever...
use SQL to answer the question. Create two tables and insert atleast 7 or 8 values（whatever you want） into each of these two tables 1) Person 2) Favorite food I need every step-codes such as ： SQL> connect admin/admin as sysdba; SQL> create table products_tb1 2 (prod_id integer primary key, 3 prod_desc char(30), 4 cost real); SQL> insert into products_tb1 values(11235, 'WITCH COSTUME', 29.99); SQL> insert into products_tb1 values(222, 'PLASTIC PUMKIN 18 INCH', 7.75); SQL> insert into products_tb1 values(13, 'FALSE...
Write SQL Queries Given the following tables (7pts) Retrieve the names of employees and their project...
Write SQL Queries Given the following
tables
(7pts) Retrieve the names of employees and their
project name. If the employee never worked on a project, show the
names only the name, not the project name.
(7pts) Retrieve the names of employees who have worked
on the same project at a different location.
(7pts) Retrieve the names of employees who have worked
on more than two different projects.
(7pts) Retrieve the names of employees who manage more
than two employees.
CREATE...
BONUS QUESTION: Suppose you have two tables, EMPLOYEES with primary key employee_ID, and DEPARTMENTS with primary...
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This assignment consists of a series of SQL questions. For each question, you will need to...
This assignment consists of a series of SQL questions. For each
question, you will need to include:
• SQL query.
• An explanation of the query. Please include explanations as a
comment AFTER your query, e.g., enclosed within a /* comments block
*/ ). See the first example in the SQL tutorial for a comment. You
don’t need to explain straightforward code in comments. Only the
parts that are interesting or different, so that we understand what
you did.
Question-1...
SQL problem solving help; First 3 tables are finnished; Need help understanding on how to do...
SQL problem solving help; First 3 tables are finnished; Need
help understanding on how to do steps after.
First 3 tables are after the first 2 images for reference if
needed.
//1//
CREATE TABLE kr_customer (
Name VARCHAR(40) NOT NULL PRIMARY KEY,
City VARCHAR(20),
Status CHAR(1)
);
//2//
CREATE TABLE kr_salesperson (
Name VARCHAR(40) NOT NULL PRIMARY KEY,
Age INT,
Salary DECIMAL(8, 2)
);
//3//
CREATE TABLE kr_order (
Order_Number number(3) NOT NULL PRIMARY KEY,
Customer_Name VARCHAR(40),
Salesperson_Name VARCHAR(40),
Amount...
True or False questions: 1. A data type mismatch error would occur when the primary key...
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Need SQL form Thanks a lot EIERCISES lowing tables form part of a database held in...
Need SQL form
Thanks a lot
EIERCISES lowing tables form part of a database held in a relational DBMS: Hote (Hotel_No, Name, Address) Roo (Room No, Hotel No. Tvpe. Price) Guest (Guest No, Name, Address) Room contains room details for each hotel and (Hotel_No, Room No) Boong Hotel No Ges, No, Date Fiom, Daie,To, RomNe) OOm where Hotel contains hotel details and Hotel No is the pri mary key forms the primary key -93
NEED THE SQL QUERIES ASAP PLEASE(LIKE 1 HOUR) THE ONES WITH ID ARE PRIMARY KEYS OR...
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Need help writing SQL statements. The questions involved use the following database Student SID – Integer...
Need help writing SQL statements. The questions involved use the following database Student SID – Integer – Primary Key SName - String Address - String Classes ClassID – Integer – Primary Key ClassName - String Credits - Integer Grades SID – Integer – Primary Key CID – Integer – Primary Key Grade - Integer Q1 – Write a script that creates a view to show all the students and all the classes they took and the grades they got in...
Write SQL Queries Given the following
tables
(7pts) Retrieve the names of employees and their
project name. If the employee never worked on a project, show the
names only the name, not the project name.
(7pts) Retrieve the names of employees who have worked
on the same project at a different location.
(7pts) Retrieve the names of employees who have worked
on more than two different projects.
(7pts) Retrieve the names of employees who manage more
than two employees.
CREATE...
This assignment consists of a series of SQL questions. For each
question, you will need to include:
• SQL query.
• An explanation of the query. Please include explanations as a
comment AFTER your query, e.g., enclosed within a /* comments block
*/ ). See the first example in the SQL tutorial for a comment. You
don’t need to explain straightforward code in comments. Only the
parts that are interesting or different, so that we understand what
you did.
Question-1...
SQL problem solving help; First 3 tables are finnished; Need
help understanding on how to do steps after.
First 3 tables are after the first 2 images for reference if
needed.
//1//
CREATE TABLE kr_customer (
Name VARCHAR(40) NOT NULL PRIMARY KEY,
City VARCHAR(20),
Status CHAR(1)
);
//2//
CREATE TABLE kr_salesperson (
Name VARCHAR(40) NOT NULL PRIMARY KEY,
Age INT,
Salary DECIMAL(8, 2)
);
//3//
CREATE TABLE kr_order (
Order_Number number(3) NOT NULL PRIMARY KEY,
Customer_Name VARCHAR(40),
Salesperson_Name VARCHAR(40),
Amount...
Need SQL form
Thanks a lot
EIERCISES lowing tables form part of a database held in a relational DBMS: Hote (Hotel_No, Name, Address) Roo (Room No, Hotel No. Tvpe. Price) Guest (Guest No, Name, Address) Room contains room details for each hotel and (Hotel_No, Room No) Boong Hotel No Ges, No, Date Fiom, Daie,To, RomNe) OOm where Hotel contains hotel details and Hotel No is the pri mary key forms the primary key -93
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