sql n prefix

Refer:http://databases.aspfaq.com/general/why-do-some-sql-strings-have-an-n-prefix.htmlYou may have seen Transact-SQL code that passes strings around using a N prefix. This denotes, the subsequent string is in Unicode (the nth actually stands for

The plus n prefix specifies that the following string is a Unicode constant, and the SQL ServerUnicodeData types are SQL-based- theThe national character data type in the standard. Sql- theuse the prefix character N to identify these data types and

You may have seen Transact-SQL code that passes strings around using an n prefix. this denotes that the subsequent string is in Unicode (the N actually stands for national language character set ). which means that you are passing an nchar, nvarchar

Method One: Use SQL statement to modify MySQL database table prefix name The first thing we think of is to use SQL query statements to modify, this method is also very convenient, just enter the phpMyAdmin, in the Run SQL query box to enter the

The prefix index of MySQL is similar to that of Oracle. MySQL has an interesting index type called prefix index. It can index the front part of a text field separately to reduce the index size. In fact,Oracle has similar implementations. For text,

    The project group received the public number years ago.After the is online, the SQL associated with the query session with the CID column is dozens of times times slower! Thinking about this question for a long time. It has been a knot in my

In this article, we learned about the implementation principle of the index under different engines of MySQL, and in this paper we will continue to explore the use and optimization of indexes.Creating an index can greatly improve the performance of

Mysql deletes tables with the specified prefix in batches and modifies the SQL statement bitsCN.com of table names in batches. Mysql deletes tables with a specified prefix in batches and modifies SQL statements of table names in batches. Select

This article belongs to theUnderstand the mysteries of performance-slow in applications, fast in SSMS"seriesNext: Understanding the Mysteries of performance-application slow, SSMs fast (5)--case: How to deal with parameter sniffingWe put aside the

emule resources can also be downloaded with thunder The following is a list of files that are shared by users, and you can download them by clicking on them after you install emule [0 Basic science sql.server.2005