What is a Schema ?

What is a Schema ?
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1 Answer

Answer :

The set of objects owned by user account is called the schema.
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How can I dump an oracle schema to a LOCAL file over a network connection from sqlplus?

Description : How can I dump an oracle schema to a LOCAL file over a network connection from sqlplus?

Last Answer : By connecting and spooling are you excluding the exp/imp commands (or expdb/impdb in 10g)?

Give the two types of tables involved in producing a star schema and the type of data they hold.

Description : Give the two types of tables involved in producing a star schema and the type of data they hold.

Last Answer : Fact tables and dimension tables. A fact table contains measurements while dimension tables will contain data that will help describe the fact tables.

What is schema?

Description : What is schema?

Last Answer : A schema is collection of database objects of a User.

Can one rename a database user (schema)? (for DBA)

Description : Can one rename a database user (schema)? (for DBA)

Last Answer : No, this is listed as Enhancement Request 158508. Workaround: Do a user-level export of user A create new user B Import system/manager fromuser=A touser=B Drop user A

Can objects of the same Schema reside in different tablespaces.?

Description : Can objects of the same Schema reside in different tablespaces.?

Last Answer : Yes.

Can objects of the same schema reside in different tablespaces?

Description : Can objects of the same schema reside in different tablespaces?

Last Answer : Yes.

What are Schema Objects?

Description : What are Schema Objects?

Last Answer : Schema objects are the logical structures that directly refer to the database's data. Schema objects include tables, views, sequences, synonyms, indexes, clusters, database triggers, procedures, functions packages and database links.

What is schema?

Description : What is schema?

Last Answer : A schema is collection of database objects of a user.

What is a Relation Schema and a Relation?

Description : What is a Relation Schema and a Relation?

Last Answer : A relation Schema denoted by R(A1, A2, …, An) is made up of the relation name R and the list of attributes Ai that it contains. A relation is defined as a set of tuples. Let r be the relation which contains set tuples (t1, t2, t3, …,tn). Each tuple is an ordered list of n-values t=(v1,v2, …, vn).

How do you collect statistics for a table, schema and Database?

Description : How do you collect statistics for a table, schema and Database?

Last Answer : Using DBMS_STATS package to gather Oracle dictionary statistics.

A set of predefined formats of text or color scheme is called ………………. (a) slide (b) presentation scheme (c) theme (d) schema -Technology

Description : A set of predefined formats of text or color scheme is called ………………. (a) slide (b) presentation scheme (c) theme (d) schema -Technology

Last Answer : (c) A set of predefined formats of text or color scheme is called theme.

A logical schema A. is the entire database B. is a standard wayof organizing information into accessible parts C. describes how data is actually stored on disk D. All of theabove E. None of the above

Description : A logical schema A. is the entire database B. is a standard wayof organizing information into accessible parts C. describes how data is actually stored on disk D. All of theabove E. None of the above

Last Answer : is a standard wayof organizing information into accessible parts

Goals for the design of thelogical schema include A. avoiding data inconsistency B. being ableto construct queries easily C. being ableto access data efficiently D. All of theabove E. None of the above

Description : Goals for the design of thelogical schema include A. avoiding data inconsistency B. being ableto construct queries easily C. being ableto access data efficiently D. All of theabove E. None of the above

Last Answer : All of theabove

In order to use a DBMS, it is important to understand A. the physical schema B. all sub-schemas that thesystem supports C. one subschema D. both (a)and (b) E. None of the above

Description : In order to use a DBMS, it is important to understand A. the physical schema B. all sub-schemas that thesystem supports C. one subschema D. both (a)and (b) E. None of the above

Last Answer : one subschema

In contrast, the contract-first approach encourages you to think of the service contract first in terms of :- a) XML b) XML Schema(.xsd) c) WSDL d) All of the mentioned

Description : In contrast, the contract-first approach encourages you to think of the service contract first in terms of :- a) XML b) XML Schema(.xsd) c) WSDL d) All of the mentioned

Last Answer : All of the mentioned

What is schema?

Description : What is schema?

Last Answer : A schema is collection of database objects of a User

Can objects of the same Schema reside in different tablespaces? –

Description : Can objects of the same Schema reside in different tablespaces? –

Last Answer : Yes.

.......... is a special type of programming language used to provide instructions to the monitor simple batch processing schema. A) Job control language (JCL) B) Processing control language (PCL) C) Batch control language (BCL)

Description : .......... is a special type of programming language used to provide instructions to the monitor simple batch processing schema. A) Job control language (JCL) B) Processing control language (PCL) C) Batch control language (BCL)

Last Answer : A) Job control language (JCL)

……………. Allows definitions and query language statements to be entered; query results are formatted and displayed. A) Schema Processor B) Query Processor C) Terminal Interface D) None of the above

Description : ……………. Allows definitions and query language statements to be entered; query results are formatted and displayed. A) Schema Processor B) Query Processor C) Terminal Interface D) None of the above

Last Answer : C) Terminal Interface

Anything that affects the database schema is a part of A) DML B) DCL C) DDL D) All of the above

Description : Anything that affects the database schema is a part of A) DML B) DCL C) DDL D) All of the above

Last Answer : D) All of the above

A logical schema A) is the entire database B) is a standard way of organizing information into accessible parts. C) Describes how data is actually stored on disk. D) All of the above

Description : A logical schema A) is the entire database B) is a standard way of organizing information into accessible parts. C) Describes how data is actually stored on disk. D) All of the above

Last Answer : B) is a standard way of organizing information into accessible parts.

………..defines the structure of a relation which consists of a fixed set of attribute-domain pairs. A) Instance B) Schema c) Program D) Super Key

Description : ………..defines the structure of a relation which consists of a fixed set of attribute-domain pairs. A) Instance B) Schema c) Program D) Super Key

Last Answer : B) Schema

A top-to-bottom relationship among the items in a database is established by a A) Hierarchical schema B) Network schema C) Relational Schema D) All of the above

Description : A top-to-bottom relationship among the items in a database is established by a A) Hierarchical schema B) Network schema C) Relational Schema D) All of the above

Last Answer : A) Hierarchical schema

In a relational schema, each tuple is divided into fields called A) Relations B) Domains C) Queries D) All of the above

Description : In a relational schema, each tuple is divided into fields called A) Relations B) Domains C) Queries D) All of the above

Last Answer : B) Domains

The database schema is written in (A) HLL (B) DML (C) DDL (D) DCL

Description : The database schema is written in (A) HLL (B) DML (C) DDL (D) DCL

Last Answer : (C) DDL

Which of the following kinds of instruction is frequently cited as the opposite of discovery learning? Options: A) Simulation games B) Expository teaching C) Mastery learning D) Schema training

Description : Which of the following kinds of instruction is frequently cited as the opposite of discovery learning? Options: A) Simulation games B) Expository teaching C) Mastery learning D) Schema training

Last Answer : B) Expository teaching

A Network Schema (A) restricts to one to many relationship (B) permits many to many relationship (C) stores Data in a Database (D) stores Data in a Relation

Description : A Network Schema (A) restricts to one to many relationship (B) permits many to many relationship (C) stores Data in a Database (D) stores Data in a Relation

Last Answer : (B) permits many to many relationship

Which of the following statements is TRUE? D1: The decomposition of the schema R(A,B,C) into R1(A,B) and R2(A,C) is always lossless. D2: The decomposition of the schema R(A,B,C,D,E) having AD→B, C→DE, B→AE, AE→C into R1(A,B,D) and R2(A,C,D,E) is lossless. (A) Both D1 and D2 (B) Neither D1 and D2 (C) Only D1 (D) Only D2

Description : Which of the following statements is TRUE? D1: The decomposition of the schema R(A,B,C) into R1(A,B) and R2(A,C) is always lossless. D2: The decomposition of the schema R(A,B,C,D,E) having AD→B, C→DE, B→AE, AE→C ... ,D,E) is lossless. (A) Both D1 and D2 (B) Neither D1 and D2 (C) Only D1 (D) Only D2

Last Answer : (D) Only D2

Consider the following two commands C1 and C2 on the relation R from an SQL database: C1: drop table R; C2: delete from R; Which of the following statements is TRUE? I. Both C1 and C2 delete the schema for R. II. C2 retains relation R, but deletes all tuples in R. III. C1 deletes not only all tuples of R, but also the schema for R. (A) I only (B) I and II only (C) II and III only (D) I, II and III

Description : Consider the following two commands C1 and C2 on the relation R from an SQL database:  C1: drop table R; C2: delete from R; Which of the following statements is TRUE? I. Both C1 and C2 delete the schema for R. II. C2 ... R. (A) I only (B) I and II only (C) II and III only (D) I, II and III

Last Answer : (C) II and III only

Relational database schema normalization is NOT for: (A) reducing the number of joins required to satisfy a query. (B) eliminating uncontrolled redundancy of data stored in the database. (C) eliminating number of anomalies that could otherwise occur with inserts and deletes. (D) ensuring that functional dependencies are enforced.

Description : Relational database schema normalization is NOT for: (A) reducing the number of joins required to satisfy a query. (B) eliminating uncontrolled redundancy of data stored in the database. (C) ... could otherwise occur with inserts and deletes. (D) ensuring that functional dependencies are enforced. 

Last Answer : reducing the number of joins required to satisfy a query.

DBMS provides the facility of accessing data from a database through (A) DDL (B) DML (C) DBA (D) Schema

Description : DBMS provides the facility of accessing data from a database through (A) DDL (B) DML (C) DBA (D) Schema 

Last Answer : (B) DML

Consider a schema R(MNPQ) and functional dependencies M→N, P→Q. Then the decomposition of R into R1(MN) and R2(PQ) is ............. (1) Dependency preserving but not lossless join. (2) Dependency preserving and lossless join (3) Lossless join but not dependency preserving (4) Neither dependency preserving nor lossless join.

Description : Consider a schema R(MNPQ) and functional dependencies M→N, P→Q. Then the decomposition of R into R1(MN) and R2(PQ) is ............. (1) Dependency preserving but not lossless ... and lossless join (3) Lossless join but not dependency preserving (4) Neither dependency preserving nor lossless join. 

Last Answer : Answer: 1

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Description : Define the term Database Schema

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Description : How to add conditions in select statement in oracle?

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Description : What are the two ways to incorporate images into a oracle forms application?

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Description : Can one export a subset of a table? (for DBA

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Description : What are the types of visual attribute settings?

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Description : How does one use the import/export utilities? (for DBA

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what is a display item?

Description : what is a display item?

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What is import/export and why does one need it? (for DBA

Description : What is import/export and why does one need it? (for DBA

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Difference between SUBSTR and INSTR ?

Description : Difference between SUBSTR and INSTR ?

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