Tài liệu Analyzing SQL doc

... • VISUAL EXPLAIN Analyzing SQL • EXPLAIN TOOLS Now we will see, precisely how, and how well the costly SQL executes SQL Explain Tools • Graphical ¾ Easy to quickly

Ngày tải lên: 15/12/2013, 10:15

... include extensions, which enhance SQL and make it behave more like a programming language. SQL Server provides a set of statements known as Transact -SQL (T -SQL) . T -SQL recognizes statements that ... strings with valid T -SQL statements. If the variable @TSQLcmd contains a valid SQL statement, you can execute it by passing it as an argument to the EXECUTE procedure: EXECUTE (@TS...

Ngày tải lên: 10/12/2013, 17:15

... truy cập vào database quản lý mySQL từ browser. end My SQL Documentation (sưu tầm) Trang: 1 MYSQL DOCUMENTATION (sưu tầm) Trong bài này, giả sử bạn đã có MySQL cài đặt sẳn trong máy và ... "\c". ví dụ: mysql> select -> user() -> \c mysql> Mysql có 4 loại dấu nhắc. Sau đây là ý nghĩa của các dấu nhắc: Prompt Ý Nghĩa mysql> Sẳn sàng cho 1 lệ...

Ngày tải lên: 19/01/2014, 15:20

... starting with SQL Server and MS Access. You simply need to read the section relevant to the database system you’re using—feel free to skip over the others. MS SQL Server and MS Access Both SQL Server ... data. That covers concatenation in Oracle and DB2. Now it’s time to look at MySQL’s way of concatenating. MySQL MySQL concatenates using one of two functions. The first is the CONCAT()...

Ngày tải lên: 14/02/2014, 03:20

... excerpt from the SQLQuery8_f0316_f0317 .sql script creates the database: DECLARE @str1 nvarchar(128) SET @str1 = 'copy "c:\Program Files\Microsoft SQL Server\' + 'MSSQL.1\MSSQL\DATA\northwnd.mdf" ... files\microsoft sql server\mssql.1\mssql\data\ rename Database_1a.bak Database_1a.mdf rename Database_1a_log.bak Database_1a_log.ldf The sample concludes by recoveri...

Ngày tải lên: 10/12/2013, 14:15

... reserved. Page 3 Mini Cheat Sheet for SQL 2005 Counter s **Note that most of these v alues assume that the physical server’s sole responsibility is running SQL Server SQL s Built-In Monitoring Systems In ... detail. Real Time Monitoring Raw SQL Counters At any given time, amazing amounts of statistical and diagnostic information are being produced by the physi- cal server and by SQL...

Ngày tải lên: 10/12/2013, 14:15

... Using SQL SQL (pronounced sequel) is the standard language for accessing relational databases. As you'll see in this chapter, SQL is easy to learn and use. With SQL, you tell the ... Start ➣ Microsoft SQL Server ➣ Query Analyzer. In the following sections, you'll learn how to connect to a SQL server instance, enter and run a SQL statement, save a SQL statement, and...

Ngày tải lên: 14/12/2013, 13:15

Ngày tải lên: 14/12/2013, 13:15

... of SQL statements is known as a commit, or committing the SQL statements. Undoing the results of SQL statements is known as a rollback, or rolling back the SQL statements. You can group SQL ... Orders table wouldn't reference a valid row. Grouping SQL Statements By default, when you run an INSERT, UPDATE, or DELETE statement, SQL Server permanently records the result...

Ngày tải lên: 14/12/2013, 13:15

... broad consumption, starting with SQL Server Reporting Services. SQL Server Reporting Services Another one of the BI services in the SQL Server platform is SQL Server Reporting Services. Reporting ... ■ Note Remember that SQL Server services can be run “a la carte.” Even if you have a significant investment in SQL Server 2005 as your data storage, you can still use SQL Server...

Ngày tải lên: 14/12/2013, 15:15