oracle sql certification practice test

Tags: china-pub computer OracleThis is a high quality pre-sale recommendation of Computer class OCA Certification Exam Guide (1z0-061) Oracle Database 12c SQL Foundation ". Oracle Certified Master (OCM) 's latest work, the OCA Certification exam official book, covers all O

"annual Salary"From EMP ORDER by 3 DESC;SELECT ename,job,sal from emp ORDER by Job,sal DESC;SELECT ename,job,sal from emp ORDER by Empno;Modify Default display widthSET line[size] {80|n}SET Line 100L display the SQL statement in the buffer you just enteredN Text modified section of error'/' (run) commandSAVEGET@ or Start command when the specified script file contents are loaded into the SQL buffer to runS

/volnet/plsqldev.ico) 7.3.2 to eliminate the black command-line window, you can also write the following bat file directly: set nls_lang=simplified Chinese_china. Zhs16gbkStart plsqldev.exe This will not show a black command-line window. The same way to modify the icon. I'm also in the study of how applications that you write can be deployed in a free-to-install manner, and this link is worth referencing: http://www.oracle.com/technetwork/issue-archive/2008/08-nov/o68odpnet-101744.html For the

running 754.2.3 benefits of preprocessing Code 764.2.4 validity verification 784.2.5 control compilation 804.2.6 query variable 814.2.7 concluding remarks on Conditional compilation 824.3 Summary 84Chapter 4 PL/SQL unit test 855.1 why test code 855.2 what is unit test 865.2.1 debug or

The Oracle tutorial you are looking at is the Oracle Pl/sql introductory case practice. We have already learned the basics of pl/sql programming, and this article will combine a case to deepen understanding of these knowledge points. A Case Introduction A database has two

application requires transactional integrity. ==================================== Save Point If necessary, You can also use the savepoint (savepoint) in a transaction to create a tag at a key point in the current transaction, and in the future you can roll back to the specified token (savepoint) to implement a partial rollback of the transaction. For example: INSERT into Dept VALUES (' Adv ', ' Beijing '); INSERT into Dept VALUES (, ' Sec ', ' Shanghai '); SavePoint p1; INSERT into De

With SPA, you can play a specific stream based on various types of changes (such as initialization parameter changes, optimizer statistics refresh, and database upgrades)SQL or the entire SQL load, and then generate a comparison report to help you evaluate their impact. In versions earlier than Oracle Database 11g, I must capture all

20-feb-81 1600 300 307521 WARD salesman 7698 22-feb-81 1250 500 307654 MARTIN salesman 7698 28-sep-81 1250 1400 307698 BLAKE MANAGER 7839 01-may-81 2850 307844 TURNER salesman 7698 08-sep-81 1500 0 307900 JAMES Clerk 7698 03-dec-81 950 306 rows selected.Define and UndefineSql> Define Name=enameSql> select name,sal from emp;Ename SAL---------- -----SMITH 800ALLEN 1600WARD 1250JONES 2975MARTIN 1250BLAKE 2850CLARK 2450SCOTT 3000KING 5000TURNER 1500ADAMS 1100JAMES 950FORD 3000MILLER 1300Rows select

A code block for the basic introduction to PL/SQLPL/sql: Process language (Procedure Language) and structured language (structured Query Language) A combined programming language is an extension to SQL that supports a variety of data types such as large objects and collection types, using control statements such as conditions and loops, creating stored procedures, packages, triggers, and so on, to

Basic PL/SQL entry cursor PL/SQL: a programming Language combined with a Structured Language (Structured Query Language). It is an extension of SQL and supports multiple data types, such as large objects and Collection types, you can use control statements such as conditions and loops to create stored procedures, packages, and triggers, and add program logic to

Basic PL/SQL entry-Table Partitioning PL/SQL: a programming Language combined with a Structured Language (Structured Query Language). It is an extension of SQL and supports multiple data types, such as large objects and Collection types, you can use control statements such as conditions and loops to create stored procedures, packages, and triggers, and add progra

Oracle, paging, and stored procedure are combined to create a paging stored procedure using PL/SQL. 1. Declare a referenced cursor [SQL] view plaincopyprint? 01. create or replace package cur_ref_type02. as -- is or as can be used03. type cur_ref is ref cursor;04. end;Create or replace package cur_ref_typeAs -- is or as can be usedType cur_ref is ref cursor;End;

, Add_months (hiredate,12*10) as service life date from EMP;--Show employee details, sorted by nameSELECT * from emp order by ename;-Show the employee's name, according to their service life, the oldest employees in the frontSelect ename from emp order BY hiredate Desc;--Displays the names, jobs, and salaries of all employees, sorted in descending order of work, sorted in ascending order by salarySelect Ename,job,sal from emp order by job desc,sal ASC;--Displays the names of all employees and th

Cursors for getting Started with PL/SQL basics PL/sql: Process Language (Procedure Language) and structured language (structured Query Language) A programming language that is a combination of Span style= "Color:rgb (51,51,51); line-height:26px; Font-family:calibri ">sql expansion, Support for a variety of data types, such as large objects and collection

Tags: oracle plsql indexed viewA view and index of the start of PL/SQL basics PL/sql: Process language (Procedure Language) and structured language (structured Query Language)The combination of the programming language, is theSQLextensions that support multiple data types, such as large objects and collection types, can use control statements such as conditions a

View and index of basic PL/SQL PL/SQL: a programming Language combined with a Structured Language (Structured Query Language). It is an extension of SQL and supports multiple data types, such as large objects and Collection types, you can use control statements such as conditions and loops to create stored procedures, packages, and triggers, and add program logic

Tags: Oracle plsql table PartitioningPL/SQL Basic Entry table partitioningPL/sql:Process Language(Procedure Language)and structured language(StructuredQuery Language)The combination of the programming language, is theSQLextensions that support multiple data types, such as large objects and collection types, can use control statements such as conditions and loops to create stored procedures, packages, trigge

Requirements Description： Need to check out a customer one year those days is a continuous business implement SQL as follows： To create a table: Copy Code code as follows: CREATE TABLE Test_num (Tyear number, Tdate date); test Data： INSERT INTO Test_num Select 2014,trunc (sysdate)-1 from dual UNION ALL Select 2014,trunc (sysdate) -002 from dual UNION ALL Select 2014,trunc (sys

optimizer is the core of SQL execution, it makes the execution plan is good or bad, directly determines the efficiency of SQL execution. There are two types of Oracle optimizer: RBO (rule-based Optimization): rule-based Optimizer CBO (cost-based Optimization): Cost-based Optimizer Starting with Oracle 10g, RBO has bee

Requirements:You need to find that a customer has continuously handled the business for those days of a year.The SQL implementation is as follows::Create a table:Copy codeThe Code is as follows:Create table test_num(Tyear number,Tdate ); Test Data:Insert into test_numSelect 2014, trunc (sysdate)-1 from dual union allSelect 2014, trunc (sysdate)-002 from dual union allSelect 2014, trunc (sysdate)-003 from du