convert varchar to int in mysql

What is the maximum length of int (11), and what is the maximum length of varchar in MySQL?　　What is the maximum length of int (11)?In the SQL statement, int represents the type of field you want to create, int represents an integer, and 11

In mysql, if I use common data sorting methods, we may not get the expected results, but mysql provides us with the CAST CONVERT function, which can CONVERT numbers accordingly, I used this function to sort Chinese characters in the past. Let's

MySQL database converts int to varchar for slow query, mysqlvarchar Two slow queries are processed in the last week because the int type cannot be converted to varchar. CREATE TABLE `appstat_day_prototype_201305` (`day_key` date NOT NULL DEFAULT '190

Simple to say about MySQL's varchar sorting problem, a cautionary tale. Sample Table structure: Let's take a look at my table structure   code is as follows copy code Show create table Cardserver G **************

Mysql database converts the varchar type to the int type, mysqlvarchar In the previous article, I introduced the slow query caused by converting int to varchar In the MySQL database. This article describes how to convert varchar to int In the Mysql

The last week has 2 consecutive processing of slow queries due to the inability to use indexes for int to varchar conversions. CREATE TABLE ' appstat_day_prototype_201305 ' (' day_key ' date not null DEFAULT ' 1900-01-01 ', ' appkey ' varchar

In the article to tell you the MySQL database in the transformation of int varchar caused by the slow query, this article to introduce the MySQL database in the varchar type into the type of int, look at it! MySQL provides us with two types of

Mysql varchar sorting CAST, CONVERT function type conversion, varcharconvert When creating a table on your own, you should create a field type as varchar (2). In fact, it should be set as integer (2). But today, we found a Sorting Problem in the

The difference between varchar and char in MySQL (GO)What is the maximum length of varchar in MySQL?one. VarChar Storage rules:4.0 versions, varchar (20), refers to a byte , if stored UTF8 kanji, can only save 6 (3 bytes per kanji)More than 5.0

When you build the table, a field type is created as varchar (2), in fact, it should be built as an integer (2), but today in the background to find the problem of sorting, varchar sort has a problem, so how to solve it?Example table structure: