Tag：Fuzzy query
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Time：2020-7-4
Complete a simple MVC based data query module, which requires fuzzy query according to name. Index.jsp： <%@ page import=”student.TestBean” %> <%@ page import=”java.util.List” %> <%@ page import=”java.util.ArrayList” %> <%@ page language=”java” contentType=”text/html; charset=UTF-8″ pageEncoding=”UTF-8″%> <% List<TestBean> list = (List<TestBean>)request.getAttribute(“list”); if(list == null){ list = new ArrayList<TestBean>(); } %> <!doctype html> <html lang=”en”> <head> <meta charset=”UTF-8″> […]
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Time：2019-11-20
1. Function and grammar description Function: a regular expression uses a specified string to describe and match a series of strings that conform to a syntax rule. Many programming languages support string manipulation with regular expressions. Mongodb uses the $regex operator to set a regular expression that matches a string. Grammar 1 { <field>: { […]
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Time：2019-11-8
Preface Fuzzy query is one of the basic operations of database, which can realize whether the given string matches the specified pattern. If the characters match exactly, it can be represented by = equal sign. If the characters match partially, it can be regarded as a fuzzy query. In relational data, use the syntax of […]
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Time：2019-10-6
Preface For a long time, the optimization of fuzzy matching in search has been a headache. Fortunately, powerful PgSQL provides an optimization scheme. Here’s a brief talk about how to optimize fuzzy matching through index. case We have an inspection report form with tens of millions of data. We need to fuzzy search a certain […]
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Time：2019-5-21
I wanted to find out how to find out the like of the int type in the Mongo database, but it didn’t seem to solve the problem. Precise query; Fuzzy query; Paging query, how many pages per page: sorted by a field (or up or down): Query number: greater than, less than, equal to; and, […]
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Time：2019-5-20
In the Where clause, Oracle can use the Like clause with wildcards to select data records that are “very similar to…” for columns of field types of datetime, char and varchar. The following wildcards are available: % Zero or more characters _ Single any character (underscore) \ Special Characters Oracle 10g or more supports regular […]
