Tài liệu Using SQL phần 4 doc

... 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 ... = 'CRCOM'; Figure 3. 24 shows this DELETE statement, along with a SELECT statement that demonstrates that the row has been removed. Figure 3. 24: Using an UPDATE statemen...

Ngày tải lên: 14/12/2013, 13:15

... SQL keywords. Although SQL isn't case sensitive, I use uppercase when specifying SQL keywords and mixed case when specifying column and table names. You may terminate a SQL statement using ... 'Cha%'; 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 us...

Ngày tải lên: 14/12/2013, 13:15

... ascending order using the ProductName column. Figure 3.13: Using the ORDER BY clause to order products by ascending ProductName You can explicitly state the order for a column using the ASC ... rows using both the UnitsInStock and ReorderLevel columns: SELECT ProductID, ProductName, UnitsInStock, ReorderLevel FROM Products ORDER BY UnitsInStock DESC, ReorderLevel ASC; Figure...

Ngày tải lên: 14/12/2013, 13:15

... ISDATE('12/20/20 04& apos;), ISDATE(12 34) ; You use the ISNUMERIC() function to determine if an expression is a valid number. The following example returns 1 and 0: SELECT ISNUMERIC(12 34) , ISNUMERIC('abc'); ... than rounded, as was done in the previous example: SELECT ROUND(1.2 345 6, 3, 1); This example returns 1.2 340 0, which is 1.2 345 6 truncated to three decimal...

Ngày tải lên: 14/12/2013, 13:15

... CustomerID = 'ALFKI'; The previous SELECT statement used the SQL standard format for joining tables. With SQL Server, you can also use the JOIN keyword for joining tables. The advantage ... this chapter. You don't need to specify the ProductID column because SQL Server will automatically supply a value using an identity. This identity was established when the Products...

Ngày tải lên: 14/12/2013, 13:15

... into Group Policy. Using Group Policy to Disable EFS in Windows XP and Windows Server 2003 For a standalone Windows XP or Windows Server 2003 system, you can disable EFS using the following ... apply this policy, System Restore will be turned on and enforced. Click Apply, then click OK. 4. Double-click Turn off Configuration. On the Setting tab, select Enable. (For more information .....

Ngày tải lên: 14/12/2013, 10:15

... installation. In addition, note that when you invoke an application install from the command line using msiexec.exe, you don't, by default, get the elevation of privileges that occurs when ... created. The following values are acceptable: 1 - REG_SZ 2 - REG_EXPAND_SZ 3 - REG_BINARY 4 - REG_DWORD 7 - REG_MULTI_SZ DisplayName Specifies the string that appears in the Security ....

Ngày tải lên: 14/12/2013, 10:15

... start:REG_DWORD to 0x4. Note As outlined in Chapter 6, valid startup options for the service include 0x2 (Automatic), 0x3 (Manual), and 0x4 (Disabled). Thus, by setting the Start value to 0x4, you disable ... Configuring the service to start up with the Local System account 4. Go to the General tab and click the Start button to restart the service. Using Registry Editor to Troubleshoo...

Ngày tải lên: 14/12/2013, 10:15

... combined, are in the window. up to speed • Date Modified. This date-and-time stamp indicates when a document was last saved. Its accuracy, of course, depends on the accuracy of your Mac's built-in

Ngày tải lên: 14/12/2013, 10:15

... Figure 4. 3: Using the SUM() function to compute the total of the UnitPrice column Using Mathematical Functions The mathematical functions allow ... numerical operations, such as getting the absolute value of a number. Table 4. 4 lists the mathematical functions available in SQL Server. The expression you may pass to the mathematical functions ... UnitPrice) FROM Products; This...

Ngày tải lên: 14/12/2013, 13:15