Oracle

Query criteria:1) Like: Fuzzy query, need to use two wildcard characters,%: represents 0 to more characters; _: Identifies a single character.2) in (list): Used to remove data from the matching list range.3) not in (list): Remove data records that

1. Case-When expressions have two forms --Simple Case function Case SexWhen ' 1 ' Then ' men 'When ' 2 ' then ' women 'Else ' other ' END --case search function CaseWhen sex = ' 1 ' Then ' man 'When sex = ' 2 ' Then ' women 'Else ' other ' END 2.

Because each device collects GPS data, it is decided to implement the sub-table. The original thought is to use JDBC to achieve, but there will always be unexpected things happen, it is depressed (such as the summary of the problem). So after

1. View V$diag_info view, can see the location of the trace file, the specific name and other information.Name column, Diag Trace is where the 11g trace file is locatedThe Default trace file is the trace file name of the current session2. Query can

1 Installation Preparation (I am here for the virtual machine environment, machine memory 6G)Yum-y Install libxp binutils compat-libstdc++-33 compat-libstdc++-33.i686 elfutils-libelf elfutils-libelf-devel gcc gcc-c++ glibc glibc.i686 glibc-common

1. The actual demand situation is as follows:650) this.width=650; "src=" Http://img.dnbcw.info/2012413/3941000.png "alt=" 3941000.png "/>Description: In the above table, a student has many courses and scores, now want to have a SQL statement, the

When using Oracle, the DBA uses the shut immediate, which results in: 650) this.width=650; "Src=" http://s3.51cto.com/wyfs02/M01/54/47/ Wkiol1r-zn-xgommaah2sskgw8s749.jpg "title=" qq picture 20141203091532.png "alt="

1. Create a student and insert the dataCreate TableStudent (namevarchar( A), ageint)Insert intoStudentValues('Z1','1');Insert intoStudentValues('Z2','6');Insert intoStudentValues('Z3','2');Insert intoStudentValues('Z4','3');Insert

To add an Oracle driver package:Adding Ojdbc6.jar in LibTo configure the plug-in in the controller:/** * Configuration plugin */public void Configplugin (Plugins me) {/*//config C3P0 database connection pool plug-in c3p0plugin c3p0plugin = new

ORA-03249: The tablespace size for automatic segment space management should have at least 5 blocks Create a tablespace for a test and report an error. SQL> select * from v $ version; BANNER------------------------------------------------------------

Solve the problem that the database cannot automatically collect statistics due to oracle11g installation. Recently, it was found that some 11 GB databases could not automatically collect statistics. Some View query results are as follows: SQL>

HQL parameter binding, unique results, paging, projection Summary (lower), hql binding Paging: Before using the paging method encapsulated by hibernate, let's review the native paging method in Oracle.   1 -- paging query 2 -- (pageNo-1) *

ORACLE11G started from scratch 1.2.4. Database Mode 1. Level 3 Model (1) Conceptual Model The schema is a description of the logical structure of the global data in the database and a public data view for all users. It mainly describes the

Various explanations on the generator node in the hbm configuration file, I made a mistake today. The class attribute of the generator node has the following values (Primary Key Generation Policy Scheme ): Assigned: primary key value specified by

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Maintenance command crs _ * discarded in Oracle12cRAC _*       Crs_stat is commonly used in Oracle 10g and 11g RAC to monitor the running status of RAC. However, the crs_stat display is incomplete, so we will perform a secondary encapsulation of crs_

Installation manual for a single Oracle12c instance on the linux6.4 Platform  I. Preparations  1.1 install the required RPM package   Binutils-2.20.51.0.2-5.11.el6 (x86_64) Glibc-2.12-1.7.el6 (x86_64) Libgcc-4.4.4-13.el6 (x86_64) Libstdc ++-4.4.4-13.

Use dbms_service to manage oracle services (Single Instance) ---- Create a new service. After the service is created, pmon automatically (dynamically) registers to tnslsnr. The service created is not permanent and will be lost after the database is

Oracle set feedback 1. set feedback on Oracle will give feedback when an SQL statement is sent by default.For example, execute the following table creation statement: Create table t_test_lll (id varchar2 (10 )); The command line returns Table