Oracle

1. Common usage of decode:Decode (condition, value1,result1[, value2, Result2],default_result)Decode is actually equivalent to an IF condition function condition equivalent to an input value, and value I is the parameter list, if the input value is

Fart on the local environment Win7+nginx1.5.9+php5.4.15+pdo_oci Done, the result is normal. Upload the test. Centos5.9+nginx1.5.9+php5.4.14+pdo_oci Result: Command line normal, fast_cgi mode normal So upgrade PHP version to the latest php5.4.33

First, row to columnThe following format is requiredConvert to:This is the most common row-to-column, the main principle is to use the Decode function, aggregation function (sum), combined with the group by group implementation of the[SQL]View

1. Nvl functionNVL (EXPR1,EXPR2), returns EXPR2 if Expr1 is empty;2. NVL2 functionNVL2 (EXPR1,EXPR2,EXPR3), returns EXPR3 if Expr1 is empty, otherwise returns EXPR2;3. Nullif functionNullif (EXPR1,EXPR2), if EXPR1=EXPR2, returns NULL, otherwise

The Awrdd is used for a comparison of two awr snapshots to achieve performance at different times of the year.Run the following statement for example to get AWRDD:@?/rdbms/admin/awrddrpt.sql2025 23 February 07:12 12026 23 February 12027 23

Interacting with Oracle DBThe following demo sample describes Oracle DB operations from the most significant level. This demo sample illustrates an Oracle DB configuration in which the user and the associated server processes are performed on

I. OverviewWe know that in Oracle, every modification of a piece of data produces a redo (that is, redo, which records the modified content). The goal is to back up the modified data to facilitate future re-work. Now there is a problem. Whenever

Oracle has its own Dblink function, which is to logically treat multiple Oracle databases as a single database, meaning that objects in another database can be manipulated in one database, for example, we create a new data database1, We need to

On the Linux operating system database server, when you log on to an Oracle 10.2 DB instance using "Sqlplus/as sysdba", the login fails with the ORA-01031: insufficient permissions.The operation that is logged on the server where the database is

In recent projects, there is a customer requirement that is divided into a total number of users every 5 minutes for all time points per day.The data scenarios are:A game in which all users online time data (of course simple summation, may have

1 Login:--Run->sqlplus-> js45st/[email protected]2 Table Space:--Create table space, specify data file (recommended under Oracle directory), initialize 100M self-increment 50Msql> Create tablespace tbs_jsnet datafile '

The previous section describes the reasons for rebuilding the index and how to rebuild it, and this section continues with several common SQL statements and stored procedures.Querying for all defunct global indexesSelect Index_name, status from

Original address:http://blog.csdn.net/lne818/article/details/3042250 PL/SQL Table---table () function usage/*PL/SQL Table---table () function usage:Using the table () function, we can replace the result set returned by PL/SQL with the table.The

EnvironmentHost Linux [[Email protected]_1 ~]$ lsb_release-alsb Version:: Base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch: Graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarchdistributor

Organize from Network + experimental character set the most important parameter that affects the Oracle database character set is the Nls_lang parameter.Its format is as follows: Nls_lang = Language_territory.charsetThe Nls_lang parameter consists

[Email protected] ~]#/u01/app/orainventory/orainstroot. SH /u01/app/orainventory.adding Read,write for group. Removing read,writefor/u01/app/orainventory to Oinstall. The execution of the script is complete.[Email protected] ~]#/u01/app/11.2.0/grid/

Using Notepad ++ to Execute Oracle SQL, executeoracle Link: http://www.toadworld.com/products/toad-for-oracle/ B /weblog/archive/2013/08/21/using-notepad-to-execute-oracle-sql.aspx Notepad ++ is a very useful text editing tool. It is also very

Listener. ora adds the listening port and listener. ora listens. A simple listener. ora # Listener. ora Network Configuration File: d: \ app \ zyd \ product \ 11.2.0 \ dbhome_1 \ network \ admin \ listener. ora # Generated by Oracle configuration

Oracle how to ensure the ACID principle of transactions -- oracle Core Technology Study Note 2 There are four general principles in the transaction that all databases must comply with, referred to as the ACID principle. The following briefly

Common Methods for viewing Oracle execution plans-Series 2 Continued article: http://blog.csdn.net/bisal/article/details/38919181 3. AUTOTRACE Switch Turn on AUTOTRACE in SQLPLUS to get the SQL Execution Plan. The prompt shows that AUTOTRACE has