sql server 2014 data types

/mysql if the client and server are not on a single host, you must use the TCP/IP protocol connection MySQL client working mode: interactive mode, batch mode (can implement MySQL script) Interactive mode command category: Client command: You can use \h in interactive mode to get client commands help \ Representatives behind each command can use the shorthand command server-side command:

shows that one row no longer exists in the second read or subsequent read because the row has been deleted by other transactions. Similarly, due to the insert operation of other transactions, the second or subsequent read of the transaction shows that a row does not exist in the original read.The above four problems will cause data inconsistency. We setThe level at which the transaction is prepared to accept inconsistent

data to store strings with more than 2 billion characters. When you need to store large strings of characters, you should use text-type data. Note that text data has no length, but the plain data mentioned in the previous section has a length. Data in a text field is usuall

Unicode Character Set is generated to solve the incompatibility problem of character sets. All its characters are expressed in two bytes, that is, English characters are also expressed in two bytes. If you are still struggling with this issue, let's take a look at the explanation below and make a decision. Generally, if you use Chinese characters or other special characters, I will use the type starting with n. Otherwise, I will directly start with var. What is the difference between varchar an

From: http://blog.163.com/liufupanhao@126/blog/static/128465170201111210446407/ Thank you for sharing your ideas! 1. Data type conversion: (1) Two conversion scenarios:A: When the data between two result sets is compared or joined together, if the data types of the two result sets are different, they must be converted

Tags: http ar data Art EF as TT htm SQLThe SQL Server string is divided into different types, and you will be presented with a few common types of SQL Server strings that you can use to

In SQL, the varchar type is converted to int and then sorted, if our database ID is set to varchar type, the order by ID when queried.If the ID of our database is set to the varchar type of the order by ID at the time of the query, we do not want to see the following situation.We can convert varchar to int and then sortOneCopy CodeThe code is as follows:SELECT * from Yourtable order by cast (yourcol as int);For SQ