Database System SQL Practice 1. Write a database description for each of the relations shown‚ using SQL DDL. Assume the following attribute data types: 2. Use SQL to define the following view: STU_ID STU_NAME 38214 54907 54907 66324 Letersky Altvater Altvater Aiken 3. Before any row can be entered in the SECTION table‚ the COURSE_ID to be entered must already exist in the COURSE table. Write an SQL assertion that will enforce
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attribute - Example: ALTER TABLE EMPLOYEE ADD JOB VARCHAR(12); - The database users must still enter a value for the new attribute JOB for each EMPLOYEE tuple. This can be done using the UPDATE command. Features Added in SQL2 and SQL-99 CREATE SCHEMA Specifies a new database schema by giving it a name. REFERENTIAL INTEGRITY OPTIONS - We can specify RESTRICT‚ CASCADE‚ SET NULL or SET DEFAULT on referential integrity constraints (foreign keys) CREATE TABLE DEPT (
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versions of SQL created in the last 26 years. In 1986‚ SQL-86 (SQL-87) was first published. In 1989‚ SQL-89 was a minor revision made to the original SQL. In 1992‚ SQL-92 (SQL2) was a major revision to its previous version. In 1999‚ SQL-99 (SQL3) added regular expression matching‚ recursive queries‚ triggers‚ non scalar types and some object oriented features. In 2003‚ SQL-2003 introduced XML related features‚ standardized sequences‚ and columns with auto generated values. In 2006‚ SQL-2006 defined
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of an application installation? - True Which of the following objects have editions? - Pl/Sql objects‚ views en synonyms Which of the following statements are true about crossedition triggers? - Antwoord niet bekend Which of the following options can be used for scheduling jobs with Oracle Scheduler? - Time‚ Outcome of other jobs‚ Events In which of the following scenarios would you use SQl Performance Analyzer? - All answers are correct What factors does Oracle Scheduler use to
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ability to flawless query information/data which allows by logical authentication to request‚ add‚ modify‚ and view correct‚ understandable intellectual organizational RDBS while using the export and import functions of ACCESS™2010®‚ EXCEL 2010‚ and MS SQL SERVER. One issue with almost all software (any type) is because humans write the code for software and on the other hand other humans reverse engineer written software finding weakness‚ and design script or bot code‚ which will become a threat agent
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company DB (schemas of tables are shown below)‚ write RA query and SQL query for each of the following. (State any reasonable assumptions only if necessary.) (1) Find the name of the city for the company which has employees with salary higher than 300‚000. This is a very simple query. Both RA and SQL require two tables: works and company. RA: city ( salary > 300000) (works |x| company) [Note: |x| denotes natural join.] SQL: There are several ways of doing this; for example‚ Select city
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WRITING YOUR RESUME FOR MICROSOFT A. • • • • • • • Things to know about US-style resumes: 1-2 pages is good. Do not give us more than 2 pages. 1 page is best. We do not want your life history. We must have your email address. No spelling errors please. Have your friends read your resume. Your resume should look significantly different from your classmates’ resumes. Put your unique experiences and skills on your resume! No photo‚ neither marital status‚ gender‚ religion‚ etc. B. A good‚ basic US-style
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Attempted Question: Question no. 4 • Describe what a relational database is and why relational databases are needed. Introduction: The knowledge of databases is an essential requirement for any being who has majored in the field of computers and IT. Same criteria is involved for a technologist. Relational Database: Relational Database‚ also known as RDB‚ is major sub-branch of Database. A relational database‚ or more commonly known as RDB‚ is a collection of multiple data sets. Mainly
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bhsbkjbkjbaskjbkjsakjshajhbjhasb hsahkjhasjkhkjha aihljah hsalhcalkhclkah haskihalkhlkhc sdjhvkjgsi shdfh sjgvhsjh jhvkj hjdvh jsdf svhhvk s hhkjs f shiofhoi syoiufe iydoi siufewiuoiheafiuh v ifyei esfy oswf woiyfosie fvi si u SQL> CREATE OR REPLACE procedure recTypeProc 2 IS 3 TYPE recType is RECORD ( 4 ename EMP.ename%TYPE‚ 5 sal EMP.sal%TYPE); 6 7 TYPE recTabType is TABLE of recType 8 INDEX by BINARY_INTEGER; 9 recTab recTabType; 10 bNew BINARY_INTEGER;
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Briefly describe what is the benefit to use SQL*Plus substitution variables? Use SQL*plus substitution variables to: Store values temporarily. Single ampersand (&) Double ampersand (&&) DEFINE command Pass variable values between SQL statements. Dynamically alter headers and footers. 02) Briefly describe what is the benefit to use the ‘&’ substitution variable? 03) Briefly describe how to using character and date values with substitution variables in SQL? 04) Briefly describe where you can use
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