Oracle

Environment: Oracle10g, Red Hat 4, Oracle running in archive mode. Scenario: the data file user01.dbf is damaged and can be recovered when the database is opened. Procedure:1. Delete the user01.dbf file to simulate that the data file is corrupted.

ORACLE Execution Plan Analysis1. What is an execution plan? An explain plan is a representation of the access path that is taken when a query is executed within Oracle. Ii. How to access data At the physical level Oracle reads blocks of data. the

  Package name Baotou File Description Dbms_aleri Dbmsalrt. SQL Asynchronous processing of database events Dbms_application_info Dbmsutil. SQL Register the name of the currently running application (for

Data Table connections include:1. Inner join (natural join): Only the rows matching the two tables can appear in the result set.2. external connections: including(1) left Outer Join (the table on the left is not restricted)(2) Right Outer Join (the

Statement 1: Obtain the week of the current month. SQL> select to_char (sysdate, 'yyyymmdd W HH24: MI: ss') from dual; TO_CHAR (SYSDATE, 'yy-------------------4 18:16:09 20030327 SQL> select to_char (sysdate, 'w') from dual; Week 2: Get the current

1 Preface-------------------------------------------------------------During the program design process, there are often differences between the two record sets. For example, identify the difference between the original order information and the

  There are nine types of tables in Oracle: 1) heap organization table) This is the standard database table. Data is managed in heap mode. When adding data, the first free space found in the segment can be used to put the data down. After the data

  When executing the DML (insert, update, delete) statement, you can use the following three implicit cursors (the cursor is an area in the memory that maintains the query results, which is opened when DML is run, when it is finished, use SQL %

  At present, regular expressions have been widely used in many software applications, including * nix (Linux, Unix, etc.), HP and other operating systems, PHP, C #, Java and other development environments. Oracle 10g Regular Expressions improve SQL

  Create or replace procedure caf_trackdiffbyId ( Sendid in number, Userid in varchar, Diffnum in number, Lats in number, Latn in number, Lngw in number, Lnge in number, Minid out number, Maxid out number ) Is CurrDate date; MinDate date; MaxDate

ClusterWare service Introduction 1. terware startup flowchart 2. Agent process started by ClusterWare layer proxy process description Orarootagent is responsible for managing the first layer of ohasd proxy process for all ohasd resources owned by

Oracle11g single-instance installation + redhat6.3 Planning 1. view the environment [root @ JSCS78DB dev] # cat/etc/redhat-release Red Hat Enterprise Linux Server release 6.3 (Santiago) [root @ JSCS78DB dev] # uname-aLinux JSCS78DB 2.6.39-prop _ 64 #

[One Moss per day]-Shared Pool optimization and Library Cache Latch conflict optimization (1523934.1)-Series 6 [one Moss per day]-Shared Pool optimization and Library Cache Latch conflict optimization (1523934.1) -Series 5

Oracle query Table Comments and column comments [SQL] select t3.table _ name, t3.comments, t2.comments, t1.COLUMN _ NAME, t1.DATA _ TYPE | '(' | decode (t1.DATA _ TYPE ,'', t1.DATA _ PRECISION + t1.DATA _ SCALE, t1.data _ length) | ')' from

"Only DBA can import files exported by other DBAs" solutions when oracle imports "only DBA can import files exported by other DBAs "solution! 1: grant dba to youuser directly to the import user. 2. log on to the import using the sysdba account, but

Oracle replaces a specific string keyword in clob: replace, dbms_lob.instr Step 1: Determine whether clob contains a specific string: for example, "/admin/ewebeditor/uploadfile/" Keyword: dbms_lob.20.code: [SQL] select st. id, st. content from

Oracle's X $ table series-X $ KSMSP has the following meanings: [K] ernal [S] torage [M] emory Management [S] GA Hea [P] each row represents a chunk in the shared pool. Let's take a look at the structure of x $ ksmsp.: SQL> desc x$ksmsp Name

After flashback drop, if the tablespace is insufficient, you can directly Delete the table occupied by the table in the recycle bin. After the demo DROP table, you can also find the table from the recycle bin, however, in DBA_FREESPACE, the space of

How to Set show parameter to display implicit parameters in oracle? show parameter in sqlplus does not show hidden parameters. You need to handle this as follows: Log On As a sys User: C:\Documents and Settings\guogang>sqlplus / as sysdba;SQL>

The inline view embedded view is called the inline view, which is also called the inline view. To put it bluntly, it is the view created during execution. For example, select... from (select... from (select ...)), the select statement used as the