select from multiple tables

Add, delete, modify, query, and delete multiple tables under the SSH framework : Add, delete, modify, and query multiple tables under the SSH framework Click to go To the Git download page. Click to go to CSDN download Project Structure: The project code is not all pasted, but the core code. You can download the projec

PHP operations on the database. Insert this post to multiple tables at a time and then edit public nbsp; function nbsp; add ($ u_id, nbsp; $ name, nbsp; $ big_classes) { nbsp; if (! Self: $ object) nbsp; PHP operations on the database. Insert multiple tables at a time This post was last edited by xuzuning at 19:

Web site in the post such functions, often need to operate a number of data tables, such as posting a post, you need to insert post post table, and then insert the post tag Post_tag relationship table, insert Post_user Post watchlist, update the tag table posts number of posts, Update the number of posts in the user table, as well as the number of points. Are these multiple data table operations completed a

PHP operations on the database. Insert this post to multiple tables at a time and then edit public nbsp; function nbsp; add ($ u_id, nbsp; $ name, nbsp; $ big_classes) { nbsp; if (! Self: $ object) nbsp; nbsp PHP operations on the database. Insert multiple tables at a time This post was last edited by xuzuning a

There are multiple Excel files, and there are more than one table (Sheet) in the file, meaning that different Excel files (Sheet) have the same table format and different values in the table. You want to create a new rollup Excel file that summarizes the corresponding (Sheet) tables in multiple child Excel files in a single file. Example: There are 2. xls files

SQL Multiple primary key tables, when the inserted data is duplicated, are prompted to violate the primary KEY constraint that cannot be inserted by the error. So, how do I find duplicate values for the inserted data? Workaround: Use Group bySuppose there is a table #a , there are saleid,vendorid,comid,price,saleprice,quantity and other fields. The primary key is: Saleid,vendorid,comid three of them. Assu

Multi-table join query. If the relationship between tables is clear and the structure is simple, creating a view SQL code CREATE VIEW view_name AS SELECT t1.xxx, t2.xxx, t3.xxx FROM (table1 t1 inner join table2 t2 ON t1.fid = t2.fid) inner join table3 t3 ON t1.mid = t3.mid; three table associations are used here, tips for writing multi-table join inner join statements 1. first, write the simplest 2-table jo

Frame: thinkphp Version: 3.2.3 Content: Query statements Problem solving: repeating field problems $Data = M (' a ')->where ($where) ->field (' A.name as aname,b.name as Uname,a.* ') ->join (' B on b.jb_id= a.ID ') ->order (' a.id desc ') ->select (); Explanation:a.* Query A table all the fields A.name as Aname convert the name repeating field in table a Aname The above is a small series for everyone to bring the thinkphp

Input {jdbc {jdbc_connection_string="Jdbc:mysql://localhost:3306/crm?zerodatetimebehavior=converttonull"Jdbc_user="Root"Jdbc_password=""jdbc_driver_library="D:/siyang/elasticsearch-5.2.2/logstash-5.2.2/mysql-connector-java-5.1.30.jar"Jdbc_driver_class="Com.mysql.jdbc.Driver"jdbc_paging_enabled="true"jdbc_page_size="50000"Statement_filepath="Filename.sql"Schedule="* * * * *"type="Jdbc_office"} JDBC {jdbc_connection_string="Jdbc:mysql://localhost:3306/crm?zerodatetimebehavior=converttonull"Jdbc_us

1, select J.id,Jt. Name,J.approvetype,J.productcode,J.customercode,U.fullname,Jf. Name as Jfname,J.expectedtimeFrom Judgeorder as JJoin Judgeordertype as JT on J.JUDGETYPE=JT. IdJoin [User] as U on J.salesmancode=u.nameJoin Judgeorderformat as JF on J.formattype=jf.id order by j.idThe core is: TableName1 as tName1 join tableName2 as tName2 on tname1.xxx = tname2.xxx Easy to understand!SQL statements, union queries between

The problem comes from a 5-year-old Baidu know the answer, just see this problem when I just went to work 21 days, then according to their own that little experience and the temporary operation of the test made the right answer at that time: But was quickly denied, I guess the main reason is that I said the last word is too absolute, but because I too believe in themselves, and there are a lot of reasons to support, so there is no in-depth study. Recently,

How does one student query associated tables for multiple courses? One student table Student Id name age six 1 Michael, 20 male 2 Zhang Si 19 male Chinese table Id keben feishu sid 1 yuwen 90 1 Mathematical table Id keben feishu sid 1 shuyue 90 1 Physical table Id keben feishu sid 1 wuli 90 1 There are many students who have the highest query efficiency. for example, they can query the Chine

A problem that has been trapped for a long time has finally been solved. The requirement is that there are many pivot tables in Excel, the data source for each pivot table is the same, and I want to have one of these pivot tables linked together.For example, I have three pivot tables, and I want to change the month option for three

A common example is that when a mall places an order, there will be 3 to 5 orders or the MVC mode. In this example, a template is created for each table, then, when the order is placed, call each model or write only one model for the order step, and then modify each table. Maybe this... for example, when a mall places an order, there are 3 to 5 orders or In the MVC mode, take the order as an example, Is to create a template for each table, and then call each model when placing an order Or w