nosql query example

This article mainly introduces the example of using the Parse_str function that can automatically split query characters in PHP. this is a function that has not been seen in the small Editor. it is convenient to split the query string in the URL, for more information, see Directly run the code: The code is as follows: $ Str = "1 errid = 1 balance = 2 balance =

'Else ' other ' END;Similarly, we can use this method to judge the salary level, and to count the number of each level. The SQL code is as follows;SELECTCase when salary When salary > Salary When salary > Salary When salary > Salary ELSE NULL END Salary_class,COUNT (*)From Table_aGROUP byCase when salary When salary > Salary When salary > Salary When salary > Salary ELSE NULL END;Two, a SQL statement to complete the different conditions of the grouping.Have the following dataCountry (country) g

Example of API call code for the express bird logistics query interface The express bird logistics query interface is free of charge, with no restrictions, and stability is also good, so the interface is connected to express bird as an example, the user ID and KEY need to apply for http://www.kdniao.com/reg. Using Syst

An example of oracle + PHP query http://qdlover.yeah.net An oracle + PHP query example I didn't need php anymore, but a lot of friends asked me, so I made an example. for details about the function, please refer to the manual. In fact, oracle functions are similar to othe

If you can use SQL computing to return results during mysql query, you can use php to handle the returned results first. For example, you can convert the case sensitivity of fields, in general, how do you perform mysql query? If you can use SQL computing to return good results, you should first return the results and use php to handle them. For

Example of using XDR in SQL2000 query. XDR doesn't know, right? It is simplified XML-Data. Now we will demonstrate how to implement such a query: SELECTo. OrderID, o. OrderDatefromOrderso, Customersc, WHEREo. CustomerIDc. c xdr? It is simplified XML-Data. Now we will demonstrate how to implement such a query. SELECT o.

In this scenario, you need to use CSS Media query to control the height of the IFRAME: for example, the height of an iframe video on a PC page is different from the height on the mobile Web page. The height of the IFRAME can only be set to a fixed height or a percentage of the div, we can control the height of this div through CSS query, to achieve the IFRAME on

--Tree Data query Example--Author: Jiangjian if exists (SELECT * from dbo.sysobjects WHERE id = object_id (n ' [TB] ') and OBJECTPROPERTY (ID, n ' isusertable ') = 1)drop table [TB]GO --Sample dataCREATE TABLE [TB] ([id] int identity (+), [PID] int,name varchar (20))Insert [TB] Select 0, ' China 'UNION ALL select 0, ' United States 'UNION ALL select 0, ' Canada 'UNION ALL Select 1, ' Beijing 'UNION ALL Sele

' other ' END;Similarly, we can use this method to judge the salary level, and to count the number of each level. The SQL code is as follows;SELECTCase when salary When salary > Salary When salary > Salary When salary > Salary ELSE NULL END Salary_class,COUNT (*)From Table_aGROUP byCase when salary When salary > Salary When salary > Salary When salary > Salary ELSE NULL END;Two, a SQL statement to complete the different conditions of the grouping.Have the following dataCountry (country) gender

results of the row to save to the array, the array subscript starting from 0, each array element corresponds to a field. By looping, you can get all the results of the query. Format: mysql_fetch_array (Result);Description: Mysql_fetch_array and Mysql_fetch_row functions are basically the same, except that it can be indexed by the offset from 0, but also by domain name. Value returns all the field values for the next row and saves them to an array, w

Example of Oracle three-layer nested paging query and rownum principle, oraclerownum For example, the data in the COMPONENT table is as follows: 1. Execute select * from (select com. *, rownum r_num from (select * from COMPONENT) com where rownum 2. Execute select * from (select com. *, rownum r_num from (select * from COMPONENT) com where rownum = 1) where r_

This article mainly introduces the implementation process of PHP + Mysql + jQuery query and list box selection operations. if you need it, refer to this article to explain how to query mysql data through ajax, the returned data is displayed in the list to be selected, and then selected to add the option to the selected area, which can be used in many background management systems. The operations on the list

-authoritative" response is replicated from other DNS servers, corresponding to the "authoritative" answer, which is the answer from the server where the domain name is located, sounds difficult to understand, let's take a look at an example. I am located in Shenzhen, where the public DNS server is 202.96.134.133, we have to check. The following figure: Here the nslookup command is used to query the DNS

("4c220a42f3924d31102bd856"), "X": 4, "J": 1} ... In the MongoDB shell, we can also use cursors as arrays: > var cursor = db.things.find ();> Printjson (cursor[4]);{"_id": ObjectId ("4c220a42f3924d31102bd858"), "X": 4, "J": 3} When using cursors, be aware of memory-consuming problems, especially large cursor objects, which may overflow memory. So shouldThe iteration is the way to output. The following example converts a cursor to a true array type

"What is the largest item number ?" Select max (article) AS article FROM shop + --------- + | Article | + --------- + | 4 | + --------- + 3.2 rows with the maximum value of a column "Find the number, merchant, and price of the most expensive article" In the ANSI-SQL this is easily done with a subquery: SELECT article, dealer, price FROM shop WHERE price = (select max (price) FROM shop) In MySQL (no subquery is available), perform the following two steps: Use a SELECT statement to obtain the max

| + --------- + -------- + ------- + 　　 Maximum value of column 3.1 "What is the largest item number ?" 　　 Select max (article) AS article FROM shop 　　 + --------- + | Article | + --------- + | 4 | + --------- + 　　 3.2 rows with the maximum value of a column "Find the number, merchant, and price of the most expensive article" 　　 In the ANSI-SQL this is easily done with a subquery: 　　 SELECT article, dealer, price FROM shop WHERE price = (select max (price) FROM shop) 　　 In MySQL (no subquery is

; // Direct calculation of sorted values, using rand () to get a random sort2. More complex fuzzy queriesSometimes we need to filter the values that match the criteria from a field, but the value is not a separate field, so we need some advanced fuzzy queries (regular).For example, you need to query a record with a value greater than 0, as follows:SELECT * from WHERE ' . *rd1= ([0][1-9]+|[ 1-9][0-9]*). *';

Session session = This.getsession (); String hql = "from Tblfwxx FW where fw.title like?"; Query query = session.createquery (HQL); Query.setstring (0, "% Yan er%"); Used above. " As a placeholder, and then set the value of the parameter one by one, using the SetString method of query. But this reduces the readability of the code. So try to use "named paramet

Copy codeThe Code is as follows:/** Function: encode the URL* Parameter description: $ web_url URL, which does not contain "http: //", for example, jb51.net*/Function HashURL ($ url ){$ SEED = "Mining PageRank is against google's terms of service. Yes, I'm talking to you, scammer .";$ Result = 0x01020345;For ($ I = 0; $ I {$ Result ^ = ord ($ SEED {$ I % 87}) ^ ord ($ url {$ I });$ Result = ($ Result> 23) 0x1FF) | $ Result }Return sprintf ("8% x", $

You can use the getDirection () method of RasterMap to query the path. Similar to the query address, the path query result notifies the application through the callback function, the following example returns the path from Nanjing to Beijing. The returned results are stored in MapDirection. MapDirection contains detail