Alter the INVOICE_LINE table by adding the INVOICE_NUM column as a foreign key referencing the INVOICE_NUM column in the INVOICES table. INVOICE NUMINVOICE DATECUST ID142162021-11-15125142192021-11-15227142222021-11-16294142242021-11-16182142282021-11-18435142312021-11-18125142332021-11-18435142372021-11-19616INVOICES toble INVOICE NUMITEM_IDQUANTITYQUOTED_PRICE14216CA75337.9914219AD72279.9914219DT1239.9914222LD1447.9914224KH81418.9914228FS421.124,9914228PF19174,9914231UF392189.9914233KH81119.9914233QB924109.9514233WB4974.9514237LP733.54.95INVOICE_LINE table4.

Alter table : used to modify column, add column/columns, add constraints, drop column, rename, drop…

Answered: Alter the INVOICE_LINE table by adding…

Alter the INVOICE_LINE table by adding the INVOICE_NUM column as a foreign key referencing the INVOICE_NUM column in the INVOICES table.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

SQL

SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.

Queries

A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.

Question

Alter the INVOICE_LINE table by adding the INVOICE_NUM column as a foreign key referencing the INVOICE_NUM column in the INVOICES table.

INVOICE NUM
INVOICE DATE
CUST ID
14216
2021-11-15
125
14219
2021-11-15
227
14222
2021-11-16
294
14224
2021-11-16
182
14228
2021-11-18
435
14231
2021-11-18
125
14233
2021-11-18
435
14237
2021-11-19
616
INVOICES toble

INVOICE NUM
ITEM_ID
QUANTITY
QUOTED_PRICE
14216
CA75
3
37.99
14219
AD72
2
79.99
14219
DT12
39.99
14222
LD14
47.99
14224
KH81
4
18.99
14228
FS42
1.
124,99
14228
PF19
1
74,99
14231
UF39
2
189.99
14233
KH81
1
19.99
14233
QB92
4
109.95
14233
WB49
74.95
14237
LP73
3.
54.95
INVOICE_LINE table
4.

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