error, labeled ' 1062 'Directly on the code drop procedure if exists test; create procedure test() #创建存储过程 BEGIN DECLARE done INT default 0 ; #定义变量 #定义主键重复异常发生时将done赋值为1;同时异常的处理方式是continue,异常发生继续执行 DECLARE CONTINUE HANDLER for 1062 SET done=1; #执行插入操作,插入过程中可能发生主键重复,如果主键重复那么done被赋值为1 insert into test(id,name) values(1,‘xiaowang‘); #如果done的值为1的话,实现更新原有数据 if done = 1 then update test set name=‘xiaowang‘ where id=1;
Excel2007 is not only a powerful computing tool, but also an excellent data management analysis tool. Compared with the professional database software, the Excel2007 is more convenient and quick in operation and suitable for the management of small and medium data.
Usually, the data table includes the table title, the table header, the footer and the table body fixed column and so on content. The first task of realizing data table analysis is to design the data table format to meet the operatio
statement similar to "query 10th to 20th record" = = = is often applied to paginated display 1 ) string sql= "Select top * From (SELECT * FROM Test where id rder by m.id desc "; Note that the ID is the primary key, the subquery takes out the first 20 records, the main query first descending and then fetch the first 10, But the result is descending, so the subsequent processing should pay attention to 2) Query article M to nth record: String sql= "SELECT Top n-m+1 * from Test where (the I
First, the header information is defined to indicate that an Excel is output. Then in the form of a table to the database information loop echo out, just fine.
Copy Code code as follows:
Header ("Content-type:application/vnd.ms-excel")
Php+mysql background, part of the program page does not display content, Error prompts error, need to repair.
Open phpMyAdmin Select Database view, and sure enough, 3 tables are displayed as "in use." Check the "Repair table", the error can not be
Originally my idea is to use PHP for the loop to execute the SQL statements more than once, but later a thought, doing so in the data is not much good, if more data, query so many times do not know how much resources to consume.
After trying to
The example in this article describes the method for MSSQL to simply query all the data in the data table. Share to everyone for your reference, specific as follows:
The following examples are given directly here:
SELECT * from Sys_logcontent
Data | repeat | Duplicate record delete a traffic violation data table duplicate record (same time [haptime], vehicle number number [numberplate], the punishment reason [reason])
First, the principle of the method:
1. In Oracle, each record has a
We used to have a few buttons on the page, control the permissions of these buttons, are all very skilled, such as btnadd Add button, Btnedit Edit button, btndelete Delete button, this page is the Student Basic information Management page
Error:
No data table components that are compatible with Windows SharePoint Services are installed
The browser does not support ActiveX controls
or disable support for ActiveX controls
The first reaction, is what is not installed, it should be
Inserting new data using INSERT statements
Syntax: INSERT [into] tbl_name [(Col_name,...)] VALUES (pression,...),...
INSERT [into] tbl_name SET col_name=expression, ...
Let's start by using the INSERT statement to increase the record, which is an
Reading a Data Manual is a required skill for an engineer. To get a Data Manual, especially an English data manual, how can I read it to find what I want faster and better:
(1) Check the date on which the manual is released, whether it is a
First, the header information is defined to indicate that an Excel is output. Then in the form of a table to the database information loop echo out, just fine.
The code is as follows
Copy Code
Header
Modify the data content in the MySQL database to delete:
[Root@hk ~]#/usr/local/mysql/bin/mysql-uroot-p ' admin ' #进入mysqlMysql> CREATE DATABASE GBK default Character set GBK collate gbk_chinese_ci; #建立一个名字叫做gbk的数据库Mysql> Use GBKmysql> show
At present, most of the business scene with InnoDB has been completely done, more and more business from MyISAM to InnoDB engine, then what are the considerations? When you understand the difference between the two engines, it's easy to know what
Excel 2016 to help the powerful "fast fill" function, can be free of functions, formula-free, to achieve rapid batch data extraction, merging, transposition, add, and other operations. Talk less, or on the point of the example to speak it!
Instance
In actual operation, the demand of the serial number is very big. For example, we often hope that the order number or the order number of products in order to automatically increment the sequential numbers without the need for manual input, when you
Can the data be passed between two different sites? Now I want to send the data of site A to the B site ....
Recommended use of cache(1) Does not affect the performance of the program is not very likely, you have said, is a large number of data.
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