Beginning Oracle Database 11g Administration From Novice to Professional

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26 CHAPTER 2 SQL AND PL/SQL Data Definition Language A large portion of the Oracle 11g SQL reference manual is devoted to DDL: commands that are used to create, alter, and drop different types of database objects such as tables and indexes. Listing 2-4 shows the DDL commands that can be used to create the , , and tables used in the first chapter. These commands specify a data type such as variable character () or numeric for each data item, the length of each data item, and, in the case of numeric data items, the precision. indicates no more than 32 data characters, and indicates a decimal number with no more than eight digits, two of which are to the right of the decimal point. Each of the three tables has a primary key, and the table is linked to the other two tables by foreign keys. All data items in this example are specified to be , which simply means that their values cannot be left unspecified. Finally, note that each SQL statement is followed by a terminating semicolon. Listing 2-4. DDL Commands to Create the Supplier, Part, and Quote Tables Database Manipulation Language You have already seen several examples of the statement. Next, let’s consider the , , , and statements.
CHAPTER 2 SQL AND PL/SQL 27 The INSERT Statement Listing 2-5 shows the statements that can be used to create the data required for the examples in the first chapter. Note that character strings, such as the supplier names and part names used in the example, are enclosed with single quote marks. Listing 2-5. DML Commands to Populate the Supplier, Part, and Quote Tables The UPDATE Statement The statement enables us to specify a subset of data rows and instructions for modifying them. In Listing 2-6—an example of how arithmetic can be used in SQL statements—all price quotes from TOOL TIME, INC. are being increased by 10 percent. Listing 2-6. DML Command to Modify the Values of Data Items
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Page 18 and 19: About the Author IGGY FERNANDEZ has
Page 20 and 21: Acknowledgments I would like to tha
Page 22 and 23: xxvi INTRODUCTION Who This Book Is
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Page 26 and 27: xxx INTRODUCTION Chapter 14: Databa
Page 28 and 29: PART I Database Concepts
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CHAPTER 5 Software Installation The
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CHAPTER 5 SOFTWARE INSTALLATION 83
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96 CHAPTER 6 DATABASE CREATION Nor
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122 CHAPTER 6 DATABASE CREATION
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132 CHAPTER 7 PHYSICAL DATABASE DE
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152 CHAPTER 8 USER MANAGEMENT AND
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PART III Database Support
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186 CHAPTER 9 TAKING CONTROL Listi
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202 CHAPTER 10 MONITORING Monitori
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220 CHAPTER 10 MONITORING Exercise
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CHAPTER 11 Fixing Problems Rise and
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CHAPTER 11 FIXING PROBLEMS 225 3.
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CHAPTER 11 FIXING PROBLEMS 227 Not
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CHAPTER 11 FIXING PROBLEMS 239 Rem
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CHAPTER 12 Backups As to our Conduc
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CHAPTER 12 BACKUPS 257 resources u
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CHAPTER 12 BACKUPS 275 Figure 12-2
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CHAPTER 13 Recovery These Officers,
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CHAPTER 13 RECOVERY 281 base admin
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CHAPTER 13 RECOVERY 289 Figure 13-
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CHAPTER 13 RECOVERY 301 Documentat
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CHAPTER 14 Database Maintenance “
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CHAPTER 14 DATABASE MAINTENANCE 30
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CHAPTER 15 The Big Picture and the
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PART IV Database Tuning
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358 CHAPTER 16 INSTANCE TUNING “
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416 CHAPTER 17 SQL TUNING Lewis, J
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418 INDEX backout section, 349 back
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420 INDEX databases administration
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422 INDEX Enable Automatic Maintena
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424 INDEX Listener Configuration, 9
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426 INDEX Perl, 91-92 perl -v comma
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428 INDEX SHOW ALL command, 269 SHO
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