By Andrew Mallett

CentOS is greatly revered as an important and versatile Linux distribution, and it may be used as an internet server, dossier server, FTP server, area server, or a multirole answer. it's designed to deal with the extra hard wishes of industrial purposes akin to community and method management, database administration, and internet prone. CentOS is self-sufficient and quick whereas operating, with the additional advantage of worldwide recognition as a great number of the world's net servers run on it.

This publication not just concentrates at the fundamentals, but additionally vitamins your current wisdom on topic parts which are very important within the firm marketplace, akin to listing prone, safeguard configuration administration, and web-based structure. by way of the top of this ebook, it is possible for you to to regulate an company Linux community inquisitive about management-centralized configuration, consumer administration, and filesystem improvements through overlaying every little thing from the most recent filesystem advances with BTRFS via to studying in regards to the new internet server at the block—Nginx.

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GetOption(eMetaSupportsTransactions, @Supported, SizeOf(Integer), PropSize); Result := Supported; end; If the database does not support multiple transactions, you want to refrain from calling StartTransaction while a transaction is active. Rollback(TransOuter); raise; end; end; Note in the preceding code that the transactions are enclosed in try/except blocks. If an exception occurs while executing the code, the transaction is rolled back. 5 contains the complete source code for an application that demonstrates dbExpress transaction support (including transaction isolation, committing and rolling back transactions, and nested transactions).

5 Parameter names and types for the long list of parameters output from the CONTACTSBYSTATE procedure. Second, there is a bug in VCL/DataCLX that effectively prevents you from retrieving table, view, and system table metadata together. If you check Tables, Views, and System Tables at the same time, GetTableNames (in the connAfterConnect method) does not return any information. Be aware of this in your own applications. Free; end; end; This code retrieves only table and view information first, putting the results into a list box.

For example, say you want to insert a number of records into the previously created EMPLOYEE table. ExecuteDirect(‘INSERT INTO EMPLOYEE VALUES (123, ‘’John Doe’’, ‘’5/15/1994’’, 35000)’); Again, QuotedStr could be used here instead of quoting the strings manually. For each employee that you want to add, you would create and execute a similar SQL statement. Parameterized SQL statements enable you to create a sort of statement template, in which you can easily enter the appropriate values for each statement before executing.

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