full-text-indexing | 易学教程

strpos() with multiple needles?

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问题 I am looking for a function like strpos() with two significant differences: To be able to accept multiple needles. I mean thousands of needles at ones. To search for all occurrences of the needles in the haystack and to return an array of starting positions. Of course it has to be an efficient solution not just a loop through every needle. I have searched through this forum and there were similar questions to this one, like: Using an array as needles in strpos Define multiple needles using

Enable Full-Text Search on View with Inner Join

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问题 I'm running Sql Server 2008 R2 and I need to enable Full-Text search on a view with a inner join. My problem is that I don't know how to create my Full-Text Index. When I use the Full-Text Indexing Wizard I get this error. A unique column must be defined on this table/view. In order for you to better understand my problem, please see the following example from w3school http://www.w3schools.com/sql/sql_join_inner.asp The last select is just my view. PersonOrderView - View SELECT Persons

Oracle: Full text search with condition

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问题 I've created an Oracle Text index like the following: create index my_idx on my_table (text) indextype is ctxsys.context; And I can then do the following: select * from my_table where contains(text, '%blah%') > 0; But lets say we have a have another column in this table, say group_id , and I wanted to do the following query instead: select * from my_table where contains(text, '%blah%') > 0 and group_id = 43; With the above index, Oracle will have to search for all items that contain 'blah' ,

#1191 - Can't find FULLTEXT index matching the column list [duplicate]

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问题 This question already has answers here : Can't find FULLTEXT index matching the column list (indexes is set) (3 answers) Closed 4 years ago . Iam trying to execute this query in my xampp, but it is not turning up. SELECT pid,description,alttext FROM wp_ngg_pictures WHERE MATCH (description, filename, alttext) AGAINST ('*image2*' IN BOOLEAN MODE) AND exclude != 1 it has returned this error #1191 - Can't find FULLTEXT index matching the column list. can any one help me plz 回答1: ALTER TABLE

MongoDB Full and Partial Text Search

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Env: MongoDB (3.2.0) with MongoS Collection: users Text Index creation: BasicDBObject keys = new BasicDBObject(); keys.put("name","text"); BasicDBObject options = new BasicDBObject(); options.put("name", "userTextSearch"); options.put("unique", Boolean.FALSE); options.put("background", Boolean.TRUE); userCollection.createIndex(keys, options); // using MongoTemplate Document: {"name":"LEONEL"} Queries: db.users.find( { "$text" : { "$search" : "LEONEL" } } ) => FOUND db.users.find( { "$text" : { "$search" : "leonel" } } ) => FOUND (search caseSensitive is false) db.users.find( { "$text" : { "

MongoDB Full and Partial Text Search

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问题 Env: MongoDB (3.2.0) with MongoS Collection: users Text Index creation: BasicDBObject keys = new BasicDBObject(); keys.put(\"name\",\"text\"); BasicDBObject options = new BasicDBObject(); options.put(\"name\", \"userTextSearch\"); options.put(\"unique\", Boolean.FALSE); options.put(\"background\", Boolean.TRUE); userCollection.createIndex(keys, options); // using MongoTemplate Document: {\"name\":\"LEONEL\"} Queries: db.users.find( { \"$text\" : { \"$search\" : \"LEONEL\" } } ) => FOUND db