Given two tables created and populated as follows: CREATE TABLE dbo.envelope(id int, user_id int); CREATE TABLE dbo.docs(idnum int, pageseq int, doctext varchar(100)); INSERT INTO dbo.envelope VALUES (1,1), (2,2), (3,3); INSERT INTO dbo.docs(idnum,pageseq) VALUES (1,5), (2,6), (null,0); What will the result be from the following query: UPDATE docs SET doctext=pageseq FROM docs INNER JOIN envelope ON envelope.id=docs.idnum WHERE EXISTS ( SELECT 1 FROM dbo.docs WHERE id=envelope.id ); Explain your answer.

Given two tables created and populated as follows: CREATE TABLE dbo.envelope(id int, user_id int); CREATE TABLE dbo.docs(idnum int, pageseq int, doctext varchar(100)); INSERT INTO dbo.envelope VALUES (1,1), (2,2), (3,3); INSERT INTO dbo.docs(idnum,pageseq) VALUES (1,5), (2,6), (null,0); What will the result be from the following query: UPDATE docs SET doctext=pageseq FROM docs INNER JOIN envelope ON envelope.id=docs.idnum WHERE EXISTS ( SELECT 1 FROM dbo.docs WHERE id=envelope.id ); Explain your answer.

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter6: Additional Database Objects

Section: Chapter Questions

Problem 6HOA: A new table has been requested to support tracking automated emails sent to customers. Create the...

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Concept explainers

Elements of Tables

In HyperText Markup Language (HTML), a table element displays data in tabular format. A table is made up of rows and columns consisting of data. A table can have multiple columns and rows.

Question

Given two tables created and populated as follows:

CREATE TABLE dbo.envelope(id int, user_id int);

CREATE TABLE dbo.docs(idnum int, pageseq int, doctext varchar(100));

INSERT INTO dbo.envelope VALUES

(1,1),

(2,2),

(3,3);

INSERT INTO dbo.docs(idnum,pageseq) VALUES

(1,5),

(2,6),

(null,0);

What will the result be from the following query:

UPDATE docs SET doctext=pageseq FROM docs INNER JOIN envelope ON envelope.id=docs.idnum

WHERE EXISTS (

SELECT 1 FROM dbo.docs

WHERE id=envelope.id

);

Explain your answer.

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