Oracle

1.clob field Insert value Create or replace procedure Updateclob ( table_name in VARCHAR2, field_id in Varchar2, Field_name in Varchar2, v_id in number, V_pos in number, V_clob in VARCHAR2) Is -- ------------------- /**//* Dynamic pl/sql, CLOB Field

Decode (divisor, 0, show 0%, not zero normal expression) instead of the original that there is a possibility of 0 of the expression in addition to the error Resolution: Select Decode (b,0,0,a/b*100) per from AA; (1) The meaning of decode Meaning

The RAC nature is also a database, using a distributed lock manager. The DLM role is to coordinate competitive access to resources between instances, while competition within instances is the same as for single instances. In a RAC database, a node

      Openscript is now a strange name for many people, but it is estimated that with the 9.0 official version of the market in June, it will be known to more and more people, And users will find this tool really useful, especially for users who are

Bywhhuang question: Oracle installed to the root directory, the root directory is not enough space, add a hard drive mount to the home, the table space to transfer data files to the home directory. Hard disk Format The newly added hard drive needs

Assuming that the data user USER1 uses the default tablespace TS1, the user USER2 uses the default table space TS2, and now imports USER1 data into USER2, which requires tablespace TS2. It is not possible to specify tablespace through imp command

The lag and lead functions can fetch the first n rows of data (lag) and the latter n rows (leads) of the same field in the same query. This type of field can be implemented using table joins to the same table, although using lag and lead functions

Hint in Oracle can be used to adjust SQL's execution plan and improve SQL execution efficiency. The following categories describe the common hint in Oracle databases. It is described here that the hint in each version of the common Hint,oracle

The size of the file supported by Oracle and the number of his db_block_size and Db_block are determined. Prior to Oracle 9i, Oracle had a maximum of 2 db_block, while the db_block_size of the database instance we built through the Oracle default

Difference between left Outer join and Outer Association (+) in "original" Oracle 2008-03-23 16:22:37 url:http://space.itpub.net/?uid-6517-action-viewspace-itemid-216974 difference between on and where in Oracle's left join 2009-09-28

 Single line function A function is the same as the functionality of a method in the Java language to perform functional support for certain operations. And now the Oracle database weight also contains a large number of single-line functions,

This article I have, the right to record inquiries, the original to the current torch Oracle Lunar goddess [Oracle@lunar ~]$ sqlplus/as sysdba sql*plus:release 11.2.0.3.0 Production on Fri Mar 23:46:35 2013 Copyrigh   T (c) 1982,

--1, Plsql or navicat database client Tools Administrator account: Table space Create tablespace demo_tablespace logging datafile ' D:\Oracle\database\ tablespace\demo.dbf ' size 100M autoextend on next 100M maxsize 500M extent management local; --2

Navicat for Oracle --Powerful Oracle database management and development tools Www.innovatedigital.com Finishing The ability to import and export multiple formats makes it easy to maintain the data. batch work scheduling process, effectively

Group By Type field, sort by code, and remove the first record from each group Method One: Select Type,min (code) from Group_infoGroup By type; Note: The columns following the select are included in the GROUP BY clause, or with aggregate

Oracle Archive mode and non-archive mode Setup Oracle's Log archive model effectively protects against instance and disk failures, is essential in database failure recovery, and needs to be set to archive mode as the Oracle initial installation mode

Objective Learning stored procedures is premised on understanding plsql syntax and how to write. To learn about Plsql, check out the previous summary. Our following table operations may be based on the following two tables: We create an employee

Weather hot, weekend at home knocking code found a strange SQL, when using the LEFT JOIN table to join the left-hand query, a-B, before a-table row a good order, suddenly confused, the first line of records ran to the last, the descending order into

Using the reverse index (index DESC), you can significantly increase the performance of SQL statements with an ORDER BY DESC clause. Another way is to create a reverse index, such as:CREATE INDEX T_IDX on table_name (time DESC);This creation, the

First, say the question In the development process, you encounter situations where Oracle DDL statements and DML statements need to be handled in one transaction, either successfully or fail. For this problem, databases such as SQL Server can be