[C#] FTP series (5) ─ Delete the data box with the specified name on FTP
Continue the previous article [C#] FTP series (4) ─ Change the file on FTP File name article, this time I’m going to s
Tag: data
MySQL – Implement the hierarchical data structure in the database
I know there are two methods: adjacency list and nested tree. It is said that due to a large number of queries, the adjacency list will be slow to traverse. But I don’t know any actual numbers in t
Error code: 1406. The data is too long – MySQL
Error code: 1406. The column data is too long
CREATE TABLE `TEST`
(
`idTEST` INT NOT NULL ,
`TESTcol` VARCHAR(45) NULL ,
PRIMARY KEY (`idTEST`)
) ; Now insert some values
INSERT IN
C # format data string.format
C # data type (2)
String char a collection of string name = “John Doe”; Double quotes, char is a single quote
string is immutable, once it is initialized, it cannot be changed. Every time you use the existing string
C # – linq to SQL is used to calculate and average a set of data (no group)
I want to execute a Linq to Sql statement that captures (filtered) counts and averages in the data set. My working principle, but in a query should be able to perform the database Two queries.
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C # with Unity Data Storage
Use Json to store data
1. Create a Json file, create a txt file directly, and change the suffix to xx.json
2. The data format of the Json file , The square brackets indicate the list, t
Mysql thousands of large data query optimization
1. Optimize queries and avoid them as much as possible For a full table scan, you should first consider establishing an index on the columns involved in where and order by. 2. Try to avoid the wh
Import Excel data for mysql using Navicat Premium
1. Create a data table based on sql.
2. Steps to insert data
3. Error message
1.Data too long for column’ccs_login_name’ at row 1
Modify the character length of ccs_login_na
C # program Send POST Request Data + Lost Solution
The C# program always fails the verification when sending the RSA-encrypted password to the backend. I use wireshark to capture packets and find that the + signs in the password sent by POST have b