Table structureRequirements: ID and name name may be repeated multiple times. But with only one ID, you need to find the most repeated names and IDs. There are several names that can repeat the most, each with a different ID.SELECT t.id,t.name,a.nu from TLeft JOIN(SELECT Id,name,count () as Nu from-t GROUP by NAME) A on T.name=a.nameJOIN(SELECT id,name,count () As num from T GROUP by NAME ORDER by num DESC LIMIT 1) CWHERE A.nu=c.numThere is a better w
1 CREATEDefiner=' Sa ' @ '%`PROCEDURE' Proc_product_leimu_parentids ' (2 inchPidINT3 )4 BEGIN5 SELECTT2.id, T2. Name from(SELECT @r as_ID, (SELECT @r:=ParentID fromProduct_leimuWHEREId=_ID) asParentID,@l:= @l + 1 asLvl from(SELECT @r:=Pid@l:= 0) VARs, Product_leimu HWHERE @r 0) T16 JOINProduct_leimu T2 ont1._id=T2.idORDER byT1.lvlDESC;7 ENDMySQL Gets the collection of all the parent category IDs and name of the subcategory IDMySQL gets the col
This is a previously encountered SQL interview problem, for reference learning:Find project IDs where all project start times are smaller than previous project end timesMysql> Select * fromT2;+----+---------------------+---------------------+|Id|Start| End |+----+---------------------+---------------------+| 1 | -- on- on xx:xx:xx | -- on- in xx:xx:xx || 2 | -- on- on xx:xx:xx | -- on- A xx:xx:xx || 3 | -- on-Geneva xx:xx:xx |
How can I obtain the Subid function under multiple parent IDs? I am working on a project. I need multiple parent IDs to query the record of the Face ID under the project. I have written a function that can only query the records under a single parent ID. I don't know how to write these records, no idea. could you help me? thank you! Here are my own functions:
function get_child_id($data, $parent_id = '0')
Three php methods for generating unique IDs and three phpid methods. Three methods for generating a unique id for php, and three methods for generating a unique id for php are found in many articles on the Internet, this article will share with you how php generates the only three methods for generating unique php IDs and three methods for generating unique php IDs
How does PHP query multiple IDs at the same time? Lt ;? Phpinclude nbsp; 'include/cmsdj. conn. php '; nbsp; $ CD_ID = SafeRequest ('id', 'Get'); nbsp; nb PHP how to query multiple IDs at the same time?
include'include/cmsdj.conn.php';$CD_ID=SafeRequest('id','get');global$db;$sql='Select*from'.tname('dj').'whereCD_ID='.$CD_ID.'';$row=$db->getrow($sql);$server=$db->getrow('select*from'.tname('server')
When you get the field ID and the method ID , you need to do a search with the field, the name of the method, and the descriptor. The retrieval process is relatively time-consuming, so this section discusses using caching techniques to reduce the cost of this process. There are two main ways to cache field IDs and method IDs . The two differences are primarily in the time at which the cache occurs, when the
Android dynamic setId to avoid duplicate IDS
When two controls with the same id are added to a layout, an error occurs when two controls with the same id are added through findVIewById.
The solution is as follows:
1. View
generateViewId()
Method to obtain an available id. Perform setId manually.
Api level 17 Required
The code of this function can be directly used below api level 17:
public static int generateViewId() { for (;;) { final i
IDS and other hidden column locations during List Data Processing
During the project maintenance phase, many people have to worry about the original position of these hidden columns. In the recent projects, hidden columns are usually placed behind the display columns, if you modify the number of columns to be displayed, increase or decrease the number of columns, you have to find the places where hidden columns are used to modify the correspondingCod
This article mainly introduces the process of JDBC connecting to Informix IDs, mainly including environment description, JDBC Configuration and demo code.
1. Environmental description
OS: Windows XP Informix: IDS V10.00.TC1 JDBC: Informix JDBC Embedded SQLJ V2.20JC2
2.JDBC Configuration
After installing Informix JDBC, add the Ifxjdbc.jar path to the CLASSPATH environment variable, such as Classpath=c:\i
When building the replica set for MongoDB (version 3.2.9), use Rs.status () to view the state of the replica set and find a member exception: Replica set IDs do not match, details are:
"lastHeartbeatMessage" : "replica set IDs do not match, ours: xxx; remote node‘s: yyy",
"stateStr" : "(not reachable/healthy)"
A variety of methods have been tried, and the member cannot be removed from the primary no
Mysql query results are ordered by IDS in (). mysql query results
Mysql query results are ordered by IDS in ().
Instance code:
The final output SQL statement is as follows:
Select style_num_id, style_id, style_title, style_pic FROM gb_style where online = 1 AND is_hide = 0 and style_num_id in (,) order by field (style_num_id );
If you have any questions, please leave a message or go to the community
SQL Server queries 31 to 40 records in the table, and writes an SQL statement to output 31 to 40 records in the UserInfo table in case of discontinuous IDS (the database is SQL Server, and the Automatically increasing id is used as the primary key, note that the ID may not be consecutive )? According to the meaning of the question, the essence is to write paging queries: the number of entries per page: 10; the current page number
SQL Server queries r
This article introduces two methods for sorting auto-incremental IDs from 1 in mysql, which reduces the workload of initializing data for a project, if you are interested, you may find it a headache to initialize data for the current project recently. In addition, the auto-increment of database IDs is getting bigger and bigger, so you need to repeat auto-increment from 1: use the following method:
Method
Original article: bypassing ids to filter information_schema continuous perfusion
// Use mysql to expose fields with errorsMysql select * from (select * from user ajoin user B) c;Error 1060 (42s21): duplicate column namehostMysql select * from (select * from user ajoin user busing (host) c;Error 1060 (42s21): duplicate column nameuserMysql select * from (select * from user ajoin user busing (host, user) c;Error 1060 (42s21): duplicate column namepassw
Well, when reading a book, I can't remember what the ID corresponds to, so ~~
User ID
1. User ID: the user ID in the logon entry of the password file is a numerical value, which identifies different users to the system. The system administrator determines the user ID while determining the login name of a user. Users cannot change their user IDs. Generally, each user has a unique user ID.
2. Group ID: the logon entry of the password file also includes
How does PHP query multiple IDs at the same time?
getrow($sql); $server=$db->getrow('select * from '.tname('server').' where CD_ID='.$row['CD_Server'].''); if($row){ $CD_Url=$row['CD_Url']; $playurl=$server['CD_Url'].$CD_Url; echo '
';}?>
The code above reads only a single ID
Display
XX. php? Id = 5555
What if I want it to display the results of multiple
Tags: saltstack ID hosts Authentication
Today, let's talk about how to set IDs and how to solve problems. I hope it will be useful to you ....
In the early stage of Host Name planning, we will design a host name recognition method based on the specific business ..
One day, the installation of a test machine is complete, but when the saltstack authenticates the key, it will find that when the master and minions are connected, it is found th
Reprint Please specify source: http://blog.csdn.net/cywosp/article/details/389680111. OverviewAs is well known, a process is an instance of a running program, but in Linux the process can be rewritten again. A process is an abstract entity defined by the kernel and assigns the entity the system resources used to run the program.From the kernel point of view. The process consists of a user memory space (User-space Memories) and a series of kernel data structures. The user memory space includes th
Category: Windows programming C + + 2012-10-27 15:38 3270 people read reviews (6) favorite reports The fourth question (Thunder written question): Write a program, open 3 threads, the IDs of the 3 threads are a, B, C, each thread will print its own ID on the screen 10 times, the output must be displayed in the order of ABC, such as: Abcabc .... recursion in turn. [CPP]View Plaincopy
#include
#include
#include
#define G_HTHREADEVENT (
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