ADDR INDX INST_ID CON_ID D--- --- --- --- -000000000E07DD5C010X 在nomount状态时,DUAL实际上就是X$DUAL。 X$这类对象,在Oracle中属于直接定义在内存结构中的,在数据库实例启动的时候,都已经创建出来。 继续搜寻### 现在知道这个表在什么地方了,还有一个疑问:这个DUAL到底是用来干嘛的呢?难道就是...
SQL profile is a collection of additional statistical information stored in the data dictionary that helps the optimizer to generate the best plan for the query. SQL profile is managed through SQL_TUNE package of SQL tuning advisor. i.e when we run SQL tuning advisor against a query, The tun...
CLOB是"Column-Level Object"的缩写,是Oracle数据库中的一种对象类型。它允许用户以列级的方式存储和访问数据,从而提高了查询和更新的性能。本文将对CLOB进行深入探讨,包括它的定义、特点、使用场景以及相关的注意事项。 1. What is CLOB? CLOB是Oracle数据库中的一个对象类型,用于存储以列为基础的数据。它与传统...
2. Functional programming to avoid local variables Simple is best, and there’s nothing wrong with using local variables. I wish I’d realised these facts when I wrote functions like this: FUNCTION address (i_name IN VARCHAR2 ,i_email_address IN VARCHAR2 ...
We have some text fields in our Oracle DB application, varchar2(4000). How should we map this in mySQL. The mysql client app. suggests that I should use a blob type. Should I do this ? or is there a better type? Perhaps there are some BLOB multi user issues that I could avoid?
New in Oracle Database 12c are: 1. Interval Reference Partitioning 2. Cascading TRUNCATE and EXCHANGE Operations 3. Moving Partitions Online 4. Maintaining Multiple Partitions 5. Maintaining Global Indexes Asynchronously 6. Using Partial Indexes Hardware and Software Requirements The following is a list...
Oracle GoldenGate 12c:Conflict Detection and ResolutionWhat is it and how to use it Bobby Curtis, EMBA Senior Technical ConsultantSubmit an http://www.enkitec.com/e4/submit-an-Accenture Enkitec GroupEnkitec joined Accenture's Infrastructure Services as Accenture Enkitec Group (May 2014)➢ 17,...
ASP.NET application not finding Oracle.Web.Dll ASP.NET bundle cache not clearing after modifications Asp.net button with Font Awesome ?? Asp.net c# - Sending email with french characters in ToAddress asp.net C# how can we know the OS the client is using ASP.NET C# write to file ASP.NE...
ojdbc6.jar for Oracle 11g R2 is the JAR files of ojdbc.jar, JDBC Driver for Oracle, to support Oracle 11g R2 database server and Java 6, 7, and 8. JAR File Size and Download Location: JAR name: ojdbc6.jar Target JDK version: 6 ...
Varchar and Varchar2 are data types in databases for variable-length character strings; Varchar2 is more specific to Oracle with defined behavior for NULL and string length.