mysql query order by

,t.before_trans_code, T.acct_num, T.retrivl_ref_num, T.resp_code, T.resp_auth_code, R.recv_ins_name,t.acq_ins_code,t.trace_num,t.trans_ Datetime,case substr (t.sa_sav2,259,1) when the 1 then ' debit card ' when 2 Then ' credit card ' when 3 then ' quasi credit card ' when 4 Then ' private prepaid card ' else ' E nd cardtype,case when locate (' VIS ', t.sa_sav2) > 0 Then ' VISA ' to locate (' JCB ', t.sa_sav2) > 0 Then ' JCB ' when Loca Te (' DNC ', t.sa_sav2) > 0 Then ' Diners ' when locate ('

Tags: Scroll method prepare win section data body multiple ICAThe most obvious feature of SQL differs from other programming languages is the order in which the code is processed. In a large number programming language, code is processed in encoded order, but in the SQL language, the first processed clause is the FROM clause, although the SELECT statement first appears, but is almost always finally processe

First, IntroductionPt-query-digest is a tool for analyzing slow queries for MySQL, which analyzes Binlog, general log, Slowlog, It can also be analyzed using showprocesslist or MySQL protocol data crawled by tcpdump. The analysis results can be exported to a file, the analysis process is the parameters of the query sta

'); INSERT into table2 (customer_id) VALUES (' 9you '); INSERT into table2 (customer_id) VALUES (' TX '); INSERT into table2 (customer_id) VALUES (NULL);After the preparation is done, table1 and table2 should look like this:Mysql> select * FROM table1; +-------------+----------+ | customer_id | City | +-------------+----------+ | 163 | hangzhou | | 9you | shanghai | | Baidu | hangzhou | | TX | h Angzhou | +-------------+----------+ 4 rows in Set (0.00 sec)

Yesterday received a customer's question, the computer can open the website, on the phone does not open the 500 error. First login on the client's server to view the environment apache+mysql+php,php and MySQL occupy are relatively high, according to experience that is the problem of MySQL, landing MySQL with show proce

Tags: ons slist number partition full table scan nts ges OTA htmFirst, IntroductionPt-query-digest is a tool for analyzing slow queries for MySQL, which analyzes Binlog, general log, Slowlog, It can also be analyzed using showprocesslist or MySQL protocol data crawled by tcpdump. The analysis results can be exported to a file, the analysis process is the paramete

How does one sort the query results in the alphabetic order of the first character? If the database uses the GBK character set $ SQL = 'select brand_id, brand_name FROM '. $ GLOBALS ['ecs']-> table ('brand'). 'order BY brand_name '; If the database uses the UTF8 Character Set $ SQL = 'select brand_id, brand_name FROM '. $ GLOBALS ['ecs']-> table ('brand '). '

: 7.2, limit Limit [offset,] NOffset offsets, optional, not written is equivalent to limit 0,nN Remove EntryTake the top 5 of the highest score Take the top 5 with the lowest score SELECT * from GRADE ORDER by stu_score ASC limit 5; Take the score ranked between 10-15 of the 5 Eight, alias tables and fields Use as to name columns Wh

Tags: mysql strong technology without professional log INF image statementEnvironment Description : WINDOWS10 Professional Edition 64-bit MySQL5.7.20 the - the first basic operation of the year star MySQL tutorial P65Original:Practice content:The above SQL statement did not get the corresponding result. cannot be used to query the highest-paid

18/1/16 In the SPRINGMVC (13): Using SPRINGMVC to optimize the order management System example (login and logout of the simple implementation), to the "Supermarket order management system" to add a new function: User management function (jump all user queries and conditional user query); Learning stage, so the use of the framework: SPRINGMVC + spring + JDBC, adde

Due to technical reasons of one party, the merchant may fail to receive the final payment notification within the expected time. in this case, the merchant can use this API to query the detailed payment status of the order. I. order query Due to technical reasons of one party, the merchant may fail to receive the fina

Tags: Pac cell span Type the MIT sel new ConnectionI. SQL statement Definition Order 1 2 3 4 5 6 7 8 9 10 SELECT DISTINCT FROM ON WHERE GROUP BY HAVING ORDER BY LIMIT 　　 　 Two. Prepare for testing 1. Create a new test database testdb; 1 CREATE DATABASE TestDB DEFAULT charset utf8; 2. Cr

This article describes how to implement the order query function in payment. Author: Fang Times studio Address: http://www.cnblogs.com/txw1958/p/wxpay-order-query.html I. Order Query Due to technical reasons of one party, the merchant may fail to receive the final payment no

Label:Source: When SQL Server creates a composite index, the composite index column order affects the performance of the query Talk about composite indexes Write index blog Too much, has not wanted to write, there are two reasons:One is the suspicion that there are fried leftovers, brothers have said: Index, as long as the query criteria to build the index on the

Tags: next soft instance IMA Image Technology Stat member EnterSQL execution OrderReprinted from: http://www.cnblogs.com/knowledgesea/p/4177830.htmlObjectiveDatabase query execution, is undoubtedly one of the programmer's necessary skills, but the process of database query execution is gorgeous and colorful, but it is very rarely understood, today brother to take you to take you fly, deep into the context o

tried to do this using the following SQL (for the sake of comparison, the columns of both tables are output): SELECT stu.name, stu.class, s.name, s.score FROM student AS stu LEFT JOIN score AS s ON stu.name = s.name AND stu.class = ‘A‘ At first glance, there seems to be no problem, but also left the connection and on the condition of the increase in class restrictions, in fact, the results appear in Class B classmate, why? It is because of the SQL execution

things, such as others built a clustered index, you have deleted, according to their own situation to build a clustered indexIsn't that a curse?Experienced you must consider qualifying the index, taking into account the search for bookmarks to avoid key lookup, we have asked for the OtherColumn2 column include in theLike this.On businessinfotable (buniessstatus1,buniessstatus2,buniessdatetime1,buniessdatetime2) INCLUDE (OTHERCOLUMN2) Or so, just the index column

Label:Order data is generally changed more data, query conditions are more complex, if there is no rule to explain, the change of the interface will be more frequent; because the individual does not like to use stitching SQL in the business side of the way, in addition to doing a safe origin, the business side of SQL splicing easy SQL injection, so do not consider using In order to satisfy this characterist

:44# User@Host: root[root] @ localhost [] Id: 2# Schema: prod Last_errno: 0 Killed: 0# Query_time: 4.025612 Lock_time: 0.000098 Rows_sent: 1 Rows_examined: 4947968 Rows_affected: 0# Bytes_sent: 68SET timestamp=1449477044;select count(*) from emp1 where empno=7788; 4. use mysqldumpslow to view slow query logs [root@rh64 mysql]# mysqldumpslowCan't determine basedir from 'my_print_defaults mys

OtherColumn2 column include in theLike this.CREATE nonclustered INDEX idx_1 on businessinfotable (buniessstatus1,buniessstatus2,buniessdatetime1, BuniessDateTime2) INCLUDE (OTHERCOLUMN2)Or so, just the index column order is differentCREATE nonclustered INDEX idx_1 on businessinfotable (BUNIESSDATETIME1,BUNIESSDATETIME2,BUNIESSSTATUS1, BUNIESSSTATUS2) INCLUDE (OTHERCOLUMN2)Of course you can adjust the order