oracle sql certification practice test

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 fro

: here, both have been positioned to occupy One of the CPUs high in SQL , which can combine the efficiency of business scenarios and SQL , and whether communication with developers such as/DBA is optimized or how to optimize (By the way, it is suggested that the amount of data in the database will have a large impact on the performance gap, this test, 10W of

A virtual index is a "false" index, which is defined in a data dictionary, but does not have the corresponding index segment, that is, it does not allocate any storage space. Using Virtual indexes, developersYou do not need to wait for the index to be created, or you do not need additional index storage space, you can use it as an index that already exists and test the execution plan of the SQL statement. I

Database development or management personnel often need to create a large amount of test data, and tens of thousands of data records are required. If one data entry is required, it will waste a lot of time, this article describes how to quickly generate a large amount of test data using an SQL statement in Oracle. The

Transfer from http://blog.csdn.net/welken/article/details/4971887 do database development or management people often want to create a large number of test data, there is no need to tens of thousands of, if one entry, it will waste a lot of time, This article describes how to quickly generate a large amount of test data in Oracle using a single

I believe that the 99 SQL statements are handled, and the basic Oracle test is just like playing (the most comprehensive and most typical entry-level Oracle query statements in history) 1. select * from emp;2. select empno, ename, job from emp;3. select empno number, ename name, job from emp;4. select job from emp;5. s

Tags: oracle plsql database synonym sequenceThe synonyms and sequences for the basic introduction to PL/SQL 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 s

Oracle SQL Test 1 SQL code www.2cto.com id sname smoney sprovince 1 zhangsan 2098 A 2 lisi 3000 B 3 wangwu 6789 C 4 liumazi 4587 C 5 dongjiu 3298 B 6 shiga 4567 A id: contract id sname: Name smoney: Performance sprovince: Region create table test (sid NUMBER, sname VARCHAR2

Oracle copies an SQL statement (test OK) for any table row, oraclesql I tested it for a long time. There are many methods on the Internet, but they are all incorrect. The correct method is as follows: declare cursor rowAll is select * from tb_news where 1=1; row1 tb_news%rowtype; i int; begin i := 0; for row1 in rowAll loop

Tags: plsql oracle stored ProceduresFirst select the procedures folder in the left folder and create a new stored procedure, as follows:Create or Replace procedure Uc_users_amount_pro (endDate in varchar2) is insmember number; Permember number; Insmembermon number; Permembermon number;--variable Name table name. Field name%type;--RowType indicates that the type is a row data type, storing a row of data, a row of data can have multiple columns, simil

Testing for a long time, the online method is many, in fact, are wrong, the correct way of writing:Declare cursor Rowall is a select * from Tb_news where 1=1; Row1 Tb_news%rowtype; i int; Begin I: = 0; For row1 in Rowall loop row1.id: = Fn_gen_getid (' tb_news '); Row1.addtime: = sysdate; Row1.starttime: = sysdate; Row1.adduserid: = -100; INSERT into tb_news values Row1; commit; End Loop;end;Accidentally, write a pass