sample_percent is a number specifying the percentage of the total row or block count to be included in the sample. The value must be in the range .000001 to (but not including) 100. Restrictions on Sampling During Queries You can specify SAMPLE only in a query that selects from a single...
sql_id sql_id, SUM (dhss.cpu_time_delta) cpu_time, SUM (dhss.elapsed_time_delta) elapsed_time, CASE SUM (dhss.executions_delta) WHEN 0 THEN 1 ELSE SUM (dhss.executions_delta) END AS executions_delta --DHSS.EXECUTIONS_DELTA = No of queries execution (per hour) FROM dba_hist_...
Oracle 11g Release 1 (11.1) SQL_层级查询(详) http://docs.oracle.com/cd/B28359_01/server.111/b28286/queries003.htm 本文内容 HR 模式 Oracle 示例 Schema 安装HR 模式 演示层级查询 层级查询 参考 HR 模式 Oracle 示例 Schema Oracle 有几个示例Schema,包括,HR(Human Resources)、OE(Order Entry)、OC...
AS SELECT查询的语法完成同样的效果,然后再采用新建的样本表重新编写查询SQL。当你指定用sample时,不支持基于规则(rule)的优化法则,ORACLE自动使用基本成本(cost)的优化法则.注意: The use of statistically incorrect assumptions when using this feature can lead to incorrect or undesirable results.这句话不太理解...
Oracle的CREATE TABLE语句用于创建表。GaussDB(DWS)直接支持该语句,无需迁移。Oracle的ALTER TABLE语句用于新增、重命名、修改或删除表列。GaussDB(DWS)直接支持该语句,无需迁移。Oracle中如果存在两张表具有相同的主键字段,则在执行ALTER TABLE时需加上表名进行区分。输
Queries Transactions Deploy Integration Services (SSIS) Projects and Packages Legacy Package Deployment (SSIS) Run Integration Services (SSIS) Packages Scale Out Catalog and Server SSIS Catalog View the List of Packages on the SSIS Server SSIS Catalog Transact-SQL Reference Integration Services (SSIS) ...
DBFS Sample Store plsql-hierarchical-profiler.zip This archive contains code to create several PL/SQL programs and to use the PL/SQL hierarchical performance profiler to record the execution of each. It also contains the profiler output for each run, prepared as a set of mutually cross-referenci...
A sample script has been provided to aid in the setup of the Oracle replication user schema. The script is available in the following directory after installation of SQL Server: <drive>:\\Program Files\Microsoft SQL Server\<InstanceName>\MSSQL\Install\oracleadmin.sql. It is also included in ...
Oracle SES throws an error to refine the queries. The wildcard operator [*] is ineffective with the escape character [\] just before it. For example [Pro\*c]. Wildcard matching cannot be used with Chinese or Japanese native characters. Understanding the Oracle SES Search User Interface 3-...
Oracle Multimedia PL/SQL Web Toolkitフォト・アルバム・サンプル・アプリケーションは、Oracle Multimediaオブジェクト型を使用したメディアのアップロードおよび取得Webアプリケーションです。このアプリケーションは、PL/SQL GatewayおよびPL/SQL Web Toolkitを使