(3, 'oracle and text'); insert into queries values (4, 'market share'); create index queryx on queries(query_string) indextype is ctxsys.ctxrule; select query_id from queries where matches(query_string, 'Oracle announced that its market share in databases increased over the last year.'...
Oracle Text uses standard SQL to index, search, and analyze text and documents stored in the Oracle database, in files, and on the Web. Oracle Text can perform linguistic analysis on documents; search text using a variety of strategies including keyword searching, contextual queries, Boolean ...
ACONTEXTindex is the basic type of Oracle Text index. This is an index on a text column. ACONTEXTindex is useful when your source text consists of many large, coherent documents. Query this index with theCONTAINSoperator in theWHEREclause of aSELECTstatement. This index requires manual synchro...
create index INDEXNAME on TABLE(COLUMN) indextype is ctxsys.context Unlike previous versions of ConText, there is no separate policy creation step. We'll talk more about this when we discuss the preference system. View indexing is not allowed in Oracle8i, consistent with regular b-tree indexes...
Oracle Textでは、XMLドキュメントの格納に使用できるXMLTypeデータ型の索引付けをサポートしています。 3.2.1.2.2 CTXCATデータ記憶域 テキスト表には、複数列にまたがって、名前、説明およびアドレスといったテキスト断片を格納し、CTXCAT索引を作成することもできます。CTXCAT索引は、複合問合せ...
--Oracle text(全文检索) 可以把任何文档和文件编入索引,从而是访问更快,更容易检索相关的信息。 Text 的索引可以存储在文件系统,数据库或者Web。 Oracle Text allows text searches to be combined with regular database searches in a singleSQL statement. It can find documents based on their textual content...
{ "text": "Amsterdam", "category": "Location", "type": "City", "offset": 96, "length": 9, "confidenceScore": 0.8, "tags": [ { "name": "Location", "confidenceScore": 0.84 }, { "name": "GPE", "confidenceScore": 0.84 }, { "name": "City", "confidenceScore": 0.8 } ]...
at oracle.sql.CharacterSetWithConverter.getInstance(CharacterSetWithConverter.java:95) at oracle.sql.CharacterSetFactoryThin.make(CharacterSetFactoryThin.java:126) at oracle.sql.CharacterSet.make(CharacterSet.java:447) at oracle.sql.CHAR.<clinit>(CHAR.java:66) at oracle.jdbc.oracore.OracleTypeCHA...
热衷于研究 MySQL 数据库内核源码、分享技术文章,并拥有 Oracle OCP 认证; 就职于江苏国泰新点软件有限公司,中央研究院-DBA 技术团队成员。 一、背景说明 项目中有一个数据交换的场景,由于使用了很多个varchar(1000)、varchar(2000),导致在创建表的时候,MySQL 提示: ...
29903. 00000 - "error in executing ODCIIndexFetch() routine"*Cause: The execution of ODCIIndexFetch routine caused an error.*Action: Examine the error messages produced by the indextype code and take appropriate action. CauseSign In To view full details, sign in with your My Oracle ...