Sql operator

Bài giảng Kiến trúc cài đặt cơ sở dữ liệu - Chương 5 (phần 2) "SQL server agent và replication" gồm có những nội dung cụ thể sau: Quản lý operator, quản lý alert, quản lý job và schedule, database mail. Mời các bạn cùng tham khảo.

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Bài giảng CSDL: Chương 4 - Ngôn ngữ thao tác dữ liệu giới thiệu các phép toán (operation): phép chọn (selection); phép chiếu (projection); phép hợp (union); phép hiệu (set difference); phép tích Descartes (Cartesian product) và ba phép toán suy ngẫm: phép kết (Join); phép giao (Intersection) và phép chia (Division). Mời bạn đọc tham khảo.

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Data Loading Methods Several methods are available for loading data into tables in an Oracle database. Of the methods available, Direct Load insert and SQL*Loader are discussed here. Export and Import are covered in the Oracle9i Database Administration Fundamentals II course. SQL*Loader SQL*Loader loads data from external files into tables of an Oracle database. It has a powerful data parsing engine that places little limitation on the format of the data in the data file. Direct Load Direct Load insert can be used to copy data from one table to another table within the same database.

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After completing this lesson, you should be able to do the following: Write a multiple-column subquery Describe and explain the behavior of subqueries when null values are retrieved Write a subquery in a FROM clause Use scalar subqueries in SQL Describe the types of problems that can be solved with correlated subqueries Write correlated subqueries Update and delete rows using correlated subqueries Use the EXISTS and NOT EXISTS operators Use the WITH clause

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Managing Privileges A privilege is a right to execute a particular type of SQL statement or to access another user’s object. These include the right to: Connect to a database Create a table Select rows from another user’s table Execute another user’s stored procedure System privileges Each system privilege allows a user to perform a particular database operation or class of database operations; for example, the privilege to create tablespaces is a system privilege.

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Profiles A profile is a named set of the following password and resource limits: Password aging and expiration Password history Password complexity verification Account locking CPU time Input/output (I/O) operations Idle time Connect time Memory space (private SQL area for Shared Server only) Concurrent sessions After a profile has been created, the database administrator can assign it to each user. If resource limits are enabled, the Oracle server limits the database usage and resources to the defined profile of the user....

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After completing this lesson, you should be able to do the following: List the operations that use temporary space Create and monitor temporary tablespaces Identify actions that use the temporary tablespace Describe the use of disk and memory for sorting Identify the SQL operations that require sorts Differentiate between disk and memory sorts List ways to reduce total sorts and disk sorts Determine the number of memory sorts performed Set parameters to optimize sorts

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On occasion you will need to perform some tasks using SQL*Plus and/or the operating system command line. In Practice 2, you will start an SQL*Plus session. Continue to keep the SQL*Plus session open to accomplish those tasks done in SQL*Plus. When performing tasks that require the operating system command line, an [ ! ] will be used from the SQL*Plus command line to get you out of SQL*Plus and into the operating system command line mode. Once you have completed your work on the operating system command line you can return to the SQL*Plus command line...

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Loading Data Several methods are available for loading data into tables in an Oracle database. Of the methods available Direct-Load insert and SQL*Loader are discussed here. SQL*Loader SQL*Loader loads data from external files into tables of an Oracle database. It has a powerful data parsing engine that puts little limitation on the format of the data in the datafile. Direct-Load insert Direct-load insert can be used to copy data from one table to another table within the same database.

32p trinh02 28-01-2013 67 4   Download

Quản trị mạng - Trong phần này chúng tôi sẽ giới thiệu cấu hình chi tiết của gói quản trị Exchange 2007 đối với System Center Operations Manager (OpsMgr) 2007. Tạo một gói quản lý mới theo yêu cầu Phần cài đặt và cấu hình Exchange Server 2007 MP mà chúng tôi đã giới thiệu cho các bạn đề cập đến việc thiết lập một số tùy chỉnh và ghi đè mang tính tùy chỉnh. Các tùy chỉnh và sự ghi đè cần phải được lưu vào một gói quản lý khác. Việc tạo một gói quản lý mới...

17p abcdef_46 06-11-2011 61 6   Download

Quản trị mạng - Trong bài này chúng tôi sẽ giới thiệu cho các bạn cách kích hoạt sự thẩm định dựa trên chứng chỉ cho việc kiểm tra các máy chủ Exchange Edge không nằm trong miền. Cài đặt Agent trên Edge Server Máy chủ Edge Transport có thể được triển khai như một máy chủ riêng biệt hoặc như một thành viên trong miền Active Directory (để biết được ưu điểm và nhược điểm của mỗi một cấu hình, bạn hãy tham khảo các tùy chọn triển khai cho máy chủ Edge Transpor). Trong topo phần một,...

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Oracle Database 2 Day DBA 11g Release- P14:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities.

10p maicon246 04-10-2010 69 6   Download

Oracle Database 2 Day DBA 11g Release- P13:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities.

20p maicon246 04-10-2010 92 7   Download

Oracle Database 2 Day DBA 11g Release- P12:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities.

20p maicon246 04-10-2010 75 6   Download

Oracle Database 2 Day DBA 11g Release- P11:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities.

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Oracle Database 2 Day DBA 11g Release- P10:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities.

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Oracle Database 2 Day DBA 11g Release- P9:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities.

20p maicon246 04-10-2010 72 6   Download

Oracle Database 2 Day DBA 11g Release- P8:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities.

20p maicon246 04-10-2010 92 7   Download

Oracle Database 2 Day DBA 11g Release- P7:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities.

20p maicon246 04-10-2010 64 6   Download

Oracle Database 2 Day DBA 11g Release- P6:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities.

20p maicon246 04-10-2010 93 8   Download