crystal report barcode generator SCHEMA MANAGEMENT in Font

Generator QR Code in Font SCHEMA MANAGEMENT

CHAPTER 5 SCHEMA MANAGEMENT
Draw QR Code In None
Using Barcode creation for Font Control to generate, create QR Code ISO/IEC18004 image in Font applications.
www.OnBarcode.com
Code 128 Maker In None
Using Barcode creation for Font Control to generate, create ANSI/AIM Code 128 image in Font applications.
www.OnBarcode.com
Note If you don t include the UPDATE GLOBAL INDEXES statement, the entire global index will be invalidated. You can also use the UPDATE GLOBAL INDEX option when you add, coalesce, exchange, merge, move, split, or truncate partitioned tables. Of course, you can use the ALTER INDEX . . . REBUILD option to rebuild any index that becomes unusable, but this option also involves additional time and maintenance.
Barcode Maker In None
Using Barcode creator for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
UPC - 13 Maker In None
Using Barcode encoder for Font Control to generate, create UPC - 13 image in Font applications.
www.OnBarcode.com
When you have a small number of index leaf blocks leading to high contention, Oracle recommends using hash-partitioned global indexes. The syntax for creating a hash-partitioned global index is similar to that used for a hash-partitioned table. For example, the following statement creates a hash-partitioned global index: SQL> CREATE INDEX hgidx ON tab (c1,c2,c3) GLOBAL PARTITION BY HASH (c1,c2) (PARTITION p1 TABLESPACE tbs_1, PARTITION p2 TABLESPACE tbs_2, PARTITION p3 TABLESPACE tbs_3, PARTITION p4 TABLESPACE tbs_4);
Print PDF-417 2d Barcode In None
Using Barcode maker for Font Control to generate, create PDF 417 image in Font applications.
www.OnBarcode.com
Data Matrix Encoder In None
Using Barcode creator for Font Control to generate, create Data Matrix image in Font applications.
www.OnBarcode.com
Local Indexes
QR Code ISO/IEC18004 Encoder In None
Using Barcode maker for Font Control to generate, create Quick Response Code image in Font applications.
www.OnBarcode.com
Creating International Standard Serial Number In None
Using Barcode creation for Font Control to generate, create ISSN - 10 image in Font applications.
www.OnBarcode.com
Locally partitioned indexes, unlike globally partitioned indexes, have a one-to-one correspondence with the table partitions. You can create locally partitioned indexes to match partitions or even subpartitions. The database constructs the index so that it is equipartitioned with the underlying table. Any time you modify the underlying table partition, the index partition is maintained automatically. This is probably the biggest advantage to using locally partitioned indexes Oracle will automatically rebuild the locally partitioned indexes whenever a partition gets dropped, or any other DDL activity occurs on a partition. Here is a simple example of creating a locally partitioned index on a partitioned table: SQL> CREATE INDEX ticket_no_idx ON ticket_sales(ticket__no) LOCAL TABLESPACE localidx_01;
Paint QR-Code In None
Using Barcode drawer for Font Control to generate, create Denso QR Bar Code image in Font applications.
www.OnBarcode.com
Denso QR Bar Code Drawer In .NET Framework
Using Barcode generation for VS .NET Control to generate, create Denso QR Bar Code image in .NET framework applications.
www.OnBarcode.com
You can use the new SQL Access Advisor tool to get recommendations on which indexes to create. The Tip Advisor will also tell you which of your indexes aren t being used and, hence, are candidates for removal. I show how to use the SQL Access Advisor in the Using the SQL Access Advisor section, later in this chapter.
QR-Code Generation In Java
Using Barcode generator for BIRT Control to generate, create QR Code ISO/IEC18004 image in BIRT applications.
www.OnBarcode.com
Paint ANSI/AIM Code 128 In Visual Studio .NET
Using Barcode encoder for .NET framework Control to generate, create Code 128 image in .NET framework applications.
www.OnBarcode.com
Monitoring Index Usage
Generating UCC.EAN - 128 In None
Using Barcode printer for Word Control to generate, create EAN / UCC - 14 image in Microsoft Word applications.
www.OnBarcode.com
Reading PDF-417 2d Barcode In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Oracle offers the EXPLAIN PLAN and SQL Trace tools to help you see the path followed by your queries on the way to their execution. You can use the EXPLAIN PLAN output or the results of a SQL Trace to see what the execution path of the query looks like and thus determine whether your indexes are being used. 18 covers EXPLAIN PLAN and SQL Trace in detail. Oracle also provides an easier way to monitor index usage in your database. If you are doubtful as to the usefulness of a particular index, you can ask Oracle to monitor the index usage. This way, if the index turns out to be redundant, you can drop it and save the storage space and the overhead during DML operations. Here s what you have to do to monitor index usage in your database. Assume you re trying to find out whether the p_key_sales index is being used by certain queries on the sales table. Make sure you use a representative time period to gauge index usage. For an OLTP database, this period
Create Linear 1D Barcode In Visual Basic .NET
Using Barcode encoder for .NET framework Control to generate, create Linear image in VS .NET applications.
www.OnBarcode.com
Barcode Decoder In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
www.OnBarcode.com
CHAPTER 5 SCHEMA MANAGEMENT
Read UPC-A In C#
Using Barcode reader for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
2D Creator In Java
Using Barcode generation for Java Control to generate, create 2D image in Java applications.
www.OnBarcode.com
could be relatively short. For a data warehouse, you may need to run the monitoring test for several days to accurately check index usage. To start monitoring the index use, log in as the owner of the p_key_sales index and run this command: SQL> ALTER INDEX p_key_sales MONITORING USAGE; Index altered. SQL> Now, run some queries on the sales table. End the monitoring by using the following command: SQL> ALTER INDEX p_key_sales NOMONITORING USAGE; Index altered. SQL> You can now query the V$OBJECT_USAGE dictionary view to find out whether the p_key_sales index is being used. The following results confirm that the index is indeed being used: SQL> SELECT * FROM v$object_usage WHERE index_name='P_KEY_SALES'; INDEX_NM TABLE_NM MON USED START_MONITORING END_MONITORING ----------------------------------------------------------------------P_KEY_SALES SALES NO YES 05/20/2005 16:19:54 05/20/2005 16:21:26 In the preceding output, Oracle placed a YES value in the USED column, thus indicating that the index in question was being used by the database. If the index had been ignored during the monitoring period, the column would contain NO instead.
QR Code 2d Barcode Generation In None
Using Barcode creator for Software Control to generate, create QR Code image in Software applications.
www.OnBarcode.com
Code 128A Drawer In Visual Studio .NET
Using Barcode drawer for ASP.NET Control to generate, create Code 128C image in ASP.NET applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.