Oracle

Can be rolled back after execute execution Flash back to restore original data after commit commitIn fact, Oracle submitted data is two-step operation, the first step execute execution, the second step commit. The corresponding Pl\sql is also to

first, the introduction Data Warehouse technology is a more mature and widely adopted solution, it is used for all the dispersed raw business data in the whole telecom operation Enterprise, and it can support different departments, different needs

Recently, the company's server seems to have a problem, often motionless will appear problems, Plsql will also frequent the crash log not up, think of the database backup, just in case. The simple code is as follows: Create process

when the query to the results of a more complex processing, you can use the joint query, subqueries and so on to get the desired results. The following is a detailed list of the classic questions, hoping to enlighten the reader. 1. Title

(1) OracleservicesidDatabase service, which automatically starts and stops the database. If a database is installed, its default startup type is automatic. The service process is ORACLE.EXE, parameter file initsid.ora, log file SIDALRT.log, console

View Lock Table SELECT l.session_id Sid, S.serial#, L.locked_mode,l.oracle_username, l.os_user_name,s.machine, S.terminal, O.object_name, s.logon_time from v$locked_object l, all_objects o, v$session s WHERE l.object_id =

(C #. NET) Oracle Database Operations class "Turn" http://hi.baidu.com/di_wan/blog/item/e51effd61814bb2a06088b62.html Connect Oracle with OracleConnectionConfiguring in Web.config ---------------------------------------------------------------------

If I hadn't used the Oracle lead this time, I wouldn't have found anything so useful. Oracle statistical analysis function lead Syntax structure: Leads (value_expr [, Offset][,default]) over ([Query_partition_clause] ORDER by

Definition: A stored procedure (Stored Procedure) is a set of SQL statements that are compiled and stored in a database in order to complete a specific function. The user specifies the name of the stored procedure and gives the parameter, if the

Recently followed puppet together again Oracle9i 9.2.0.1, although previously learned from the DBA's point of view to study every problem, but after all, not enough cow fork we will find that the entire Oracle system architecture is not what we can,

Grammar: MERGE into [Your table-name] [rename your table here] USING ([Write your query here]) [Rename your and Query-sql G just like a table] on ([conditional expression here] and [...] ...) When mathed THEN [I can execute some update SQL or

Query and delete duplicate records SQL statement 1, find redundant records in the table, duplicate records are based on a single field (ID) to determine select * from table where Id in (select Id from table group Byid having count (ID) > 1) 2,

1, open cmd, enter Sqlplu 2, enter the username you remember password: Scott/tiger 3, Conn/as SYSDBA//As the operating system administrator login, do not need to provide password 4, show user// Displays the current user example: User is "SYS" 5,

Learn python, recording the process to make a backup, convenient for later inquiries. Learn from other great God articles that will be recorded before the text.Reference article:

Indexes (Index) a test in the university, because it is a course of examination, usually do not how to learn, but to do a test volume, so everyone panic, each prepared their own small copy, everyone has more than 20 pages (exaggeration), witty

CREATE OR REPLACE TYPE str_split is TABLE of VARCHAR2 (4000);CREATE OR REPLACE FUNCTION splitstr (p_string in VARCHAR2, P_delimiter in VARCHAR2)Return Str_splitpipelinedAsV_length Number: = Length (p_string);V_start number: = 1;V_index

Oracle rownum pseudo fields are used more frequently, especially in pagination, but because of its particularity many people may not understand its actual behavior, the network has many articles to introduce this rownum usage, but many are speaking

Stored ProceduresA set of SQL statements that are used to complete a specific database function that is compiled and stored in the database system. At the time of use, the user invokes and executes a stored procedure name that has already been

1. Non-null (NOT NULL) constraint: The defined column is not absolutely null;For example, modify the BookName field in the created table book to Be not empty:Use ALTER TABLE .... MODIFY ..... Not NULL;ALTER TABLE not NULL;2. Primary key (PRIMARY

Oracle optimizes or replaces several words in, exists, and union. Test No problem!Select the appropriate statement according to the actual situation. Assume exponential, or full table scan, in and not in should be used with caution. Doing so will