October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth Edition
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Beginning a Transaction
Transactions are quite simple to implement. You will examine the SQL syntax used to perform transactions with the Sybase SQL Server and the Oracle relational database management system (RDBMS).
 | All database systems that support transactions must have a way to explicitly tell the system that a transaction is beginning. (Remember that a transaction is a logical grouping of work that has a beginning and an end.) Using Personal Oracle, the syntax looks like this: |
SET TRANSACTION {READ ONLY | USE ROLLBACK SEGMENT segment}
The SQL standard specifies that each database's SQL implementation must support statement-level read consistency; ...
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