. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8. Data Page — Type 0x05 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 8.2. Record Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.4. Examining The Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8.4.1. Compressed Data. . . . . . . . . .

. . 22 3. Data Types and Subtypes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.1. Integer Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.2. Floating-Point Data Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.3. Fixed-Point Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 24 3. Data Types and Subtypes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.1. Integer Data Types . . . Floating-Point Data Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 3.2.1. Approximate Floating-Point Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 3.3. Fixed-Point Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

onwards. -M[ETA_DATA] This switch causes your data to be ignored and not backed up or restored. In a backup, only the database meta data are backed up. When used in a restore, any data in the dump file creating database clones which are required to contain only the tables, indices etc but none of the data. -PAS[SWORD] Supplies the password for the username specified above. This need not be file -CO[NVERT] backup external files as tables -E[XPAND] no data compression -FA[CTOR] blocking factor -G[ARBAGE_COLLECT) inhibit garbage

a single file database is simply the database name and for multi-file databases, it is the first data file added. Coming up in the remainder of this manual, we will discuss the following: • Command This makes the shadow file the new database file, and the users are able to continue processing data as normal and without loss. In the event that your main database file(s) become corrupted or unreadable the efficiency of the database performance. It is far quicker to read data from memory that it is to have to physically read the data from disc. The size of the database cache is dependent on the database

◦ Create, update, query, and drop data or metadata. ◦ Input a script file containing a batch of SQL statements in sequence without prompting. ◦ Add and modify data. ◦ Grant user permissions. ◦ Perform remains uncharged. Using -ex(tract) The command line switch -ex(tract) can be used to extract meta data from the database. It can be used in conjunction with the -o(utput) switch to extract the information select MON$DATABASE_NAME from mon$database; MON$DATABASE_NAME ================================= /data/databases/firebird/test.fdb Chapter 8. Connecting To A Database 17 Chapter 9. Creating A Database

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 8.9. Stream of BLOB data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reading row data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Appendix A: External Data Representation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Appendix B: Data types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4.2. Protecting User Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.2.2. Limiting the distribution of data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . physical access to a database file there is no effective way to prevent that user from reading all data (and metadata) within that file.  “Adequate” security is dependent on the level of security required

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237 6. Data Manipulation-Statements (DML) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . gespeichert als INTEGER (exact data) DECIMAL(4,2) INTEGER (data * 102) DECIMAL(10,4) (Dialekt 1) DOUBLE PRECISION (Dialekt 3) BIGINT (data * 104) 3.4. Datentypen für Datum Typen "DATE", "TIME" und "TIMESTAMP". Der SQL-Standard ruft diese Datetime- Literale auf. Syntax <data_type> 'date_literal_string' Beispiel -- 1 UPDATE PEOPLE SET AGECAT = 'SENIOR' WHERE BIRTHDATE

............................................................................... 366 ON EXTERNAL [DATA SOURCE] ........................................................................ 366 Особенности Зарезервированные и ключевые слова; • Типы и подтипы данных; • Операторы DDL (Data Definition Language — язык создания данных); • Операторы DML (Data Manipulation Language — язык обращения с данными); • Операторы управления NUMERIC(4) SMALLINT NUMERIC(4,2) SMALLINT (data * 102) NUMERIC(10,4) DOUBLE PRECISION в 1-ом диалекте BIGINT в 3-ем диалекте (data * 104) Внимание Всегда надо помнить