Oracle 1Z MySQL 5 Developer Certified Professional(R) Part II.

Transcription

1 Oracle 1Z0-872 MySQL 5 Developer Certified Professional(R) Part II

2 A. ELECT B. DELETE C. UPDATE D. All of the above Answer: A,C,D QUESTION: 62 What is the maximum number of triggers that can be defined for a given table? A. Three triggers can be defined per table: 1 each for INSERT, UPDATE, and DELETE. The trigger must be defined to occur either before or after the event. B. Six triggers can be defined per table: 2 each for INSERT, UPDATE, and DELETE, combined with a definition of whether they occur before or after the event. C. A maximum of 128 triggers can be defined for a table, irrespective of update type and when they occur. D. A maximum of 1024 triggers can be defined for a table, irrespective of update type and when they occur. E. The number of triggers that may be defined for a table are in practice only limited by the amount of disk space available. QUESTION: 63 Consider the following table structure of the table city: You wish to add a trigger which will use the NEW and OLD structures to perform an update on all the records in the table. The trigger is defined as below, CREATE TRIGGER Code_Update BEFORE UPDATE ON Country 30

3 FOR EACH ROW BEGIN END; A. UPDATE City SET CountryCode = NEW.Code WHERE CountryCode = OLD.Code; B. SET City.CountryCode = NEW WHERE City.CountryCode = OLD; C. SET City.CountryCode = NEW.Code WHERE City.CountryCode = OLD.Code; QUESTION: 64 Which of the following are valid ways of returning information on whether the field value is present in the table animals? A. SHOW COLUMNS FROM animals B. SHOW COLUMNS FROM animals WHERE Field = 'value' C. SHOW value FROM animals D. SELECT COLUMNS FROM animals. Value E. SELECT COLUMNS.value FROM animals WHERE Field = 'value' Answer: A,B,C QUESTION: 65 Which of the following correctly demonstrates using mysqlshowto list databases on a server? A. mysqlshow B. mysqlshow database C. mysqlshow databases D. mysqlshow list databases Answer: A QUESTION: 66 Will the following two queries produce the same result? If not, why? SELECT TABLE_NAME F ROM INFORMATIOH_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'mysql' SELECT table_name F ROM inf o rmation_schema.tatales 31

4 WHERE tatale_schema = 'mysql' A. Yes. B. No; all references to the INFORMATION_SCHEMA database, including the table and column names must be uppercase. C. No; the database name, INFORMATION_SCHEMA, is case insensitive, but table and column name references must be uppercase. D. No; the database and table names are case insensitive, but column name references must be uppercase. Answer: A QUESTION: 67 Which of the following correctly demonstrates using mysqlshowto display the names of tables in the world database? A. mysqlshow world B. mysqlshow tables world C. mysqlshow world tables QUESTION: 68 Complete the following sentence. The infofmation_schema. schemata table contains information about A. the table structure for all databases. B. all of the tables, triggers and views for every database. C. all of the databases on the server, such as name, character set and collation. D. every database's structure including tables, triggers, stored routines, views, etc. Answer: C QUESTION: 69 Will the following select query list all of the tables in the information_schema database? If not, why? 32

5 SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'INFORMATION_SCHEMA' ORDER BY TABLE_NAME A. Yes. B. No; the INFORMATION_SCHEMA database does not contain information on itself. C. No; the WHERE clause is incorrect. The correct field name is TABLE_SCHEMATA. D. No; there is no table in the INFORMATION SCHEMA database called TABLES. Answer: A QUESTION: 70 Which of the following methods can be used to find out which character sets are in use across the server? A. SHOW CHARACTER SETS B. Use the INFORMATION_SCHEMA.COLUMNS table C. This can not be done 33

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