Có 16+ tài liệu thuộc chủ đề "tài liệu SQL"
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§Ó truy xuÍt d÷ liÖu tõ c¸c dßng vµ c¸c cĩt cña mĩt hay nhiÒu b¶ng, khung nh×n, ta sö dông c©u lÖnh SELECT. Chó ý: C¸c thµnh phÌn trong mĩt c©u lÖnh SELECT ph¶i ®îc sö dông theo thø tù. MÖnh ®Ò FROM trong c©u lÖnh SELECT ®îc sö dông nh»m chØ ®Þnh c¸c b¶ng vµ khung nh×n cÌn...
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SQL có thể:. Thực hiện các truy vấn đối với cơ sở dữ liệu.. Lấy dữ liệu từ cơ sở dữ liệu.. Chèn table mới trong một cơ sở dữ liệu.. Xóa thông tin trong cơ sở dữ liệu.. Cập nhật các table trong cơ sở dữ liệu.. Với SQL, chúng ta có thể truy vấn CSDL và có một...
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6.1 Các câu l nh ệ SQL Server. ử ụ ể ổ ứ ả ấ ữ ệ ợ ư ữ ơ ở ữ ệ SQL là m t h th ng ngôn ng bao g m t p các câu l nh s d ng đ t ộ ệ ố ữ ồ ậ ệ ử ụ ể ươ ng tác...
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Working with SQL Server Database Objects Assignments. BookParadise is an online library management system used by a library in Seattle. The software makes use of SQL Server 2005 databases. Information about thousands of books are maintained and updated regularly. In the recent few years, BookParadise has grown in size after receiving international funding and the number of books has increased...
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Working with SQL Server Database Objects Assignments. ToyzUnlimited maintains the details of all branded toy products in a SQL Server 2005 database.. To speed up the day-to-day tasks and operations related to the database, it has been decided to use SQL Server 2005 stored procedures for commonly performed tasks.. Name varchar(30) Name of the toy. Category varchar(30) Category of the...
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Identify the stages in the Database Development Life Cycle (DDLC) Identify the effects of poor database planning and design. Identify the stages in the Database Development Life Cycle (DDLC). In addition, this lesson explains the need for database planning and design and the stages in the database development life cycle.. One of the major tasks in a computer system is...
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Describe the types of data models Create an entity-relationship model. Data Models Lesson 2 / Slide 1 of 14. Data Models. Describe the types of data models. The lesson identifies the types of data models. This lesson also explains the entity- relationship model and the relational model. The scope of the database is determined at which stage of the DDLC?....
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Relational Database Design 1C.2. Collaborate Lesson 1C / Slide 1 of 20. In this section, you will learn about the following:. Relational Database Design 1C.4. Collaborate Lesson 1C / Slide 2 of 20. In the network model, data is represented using a collection of records.. In the hierarchical model, records are organized in a tree-like structure.. Lesson 1C / Slide...
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He wants to display the following:. All details of the employees in the Finance division.. The result will be the following table:. Jack has created a table to store records of the regular. He has also created another table to store the records of the regular suppliers and the product they supply. He needs to create a third table, Customer-Supplier...
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Map an E/R Diagram to Tables in relation to the following:. Logical Database Design Lesson 2A / Slide 1 of 15. Logical Database Design. Map an E/R diagram to tables in relation to the following:. This lesson also contains tips for logical database design and covers the various types of keys and their applications. Logical Database Design Lesson 2A /...
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Describe the first, second, and third normal forms Describe the Boyce-Codd Normal Form (BCNF) Appreciate the need for denormalization. Normalizing and Denormalizing Data Lesson 2B / Slide 1 of 18. Normalizing and Denormalizing Data. Describe the Boyce-Codd Normal Form (BCNF). Normalizing and Denormalizing Data Lesson 2B / Slide 2 of 18. Which of the following options is true?. The primary...
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Collaborate Lesson 2C / Slide 1 of 25. Collaborate Lesson 2C / Slide 2 of 25. A domain is a set of data values that are of the same type.. However, every value in the domain may not appear in the table.. A domain is a set of data values that are of the same type. Attribute CITY in the...
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He needs to review the weekly sales record of the store. Therefore, we need to create a separate table, Customer as follows:. C_ID C_Name. Therefore, we need to create another table, Bill as follows:. Therefore, we need to create another table Item as follows:. STUD-ID NAME BATCH-NO. The bank wants to keep a record of the birth dates of individual...
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A table is said to be in the. when each cell of the table contains precisely one value.. The information in parentheses includes the column names or attributes of the customer table. The size of the column is specified in parentheses after the name of the data type.. The primary key is also defined in the above statement by using...
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Implementing Transaction and Security Lesson 3B / Slide 1 of 25. Implementing Transaction and Security. Implementing Transaction and Security Lesson 3B / Slide 2 of 25. Which type of view includes all rows but only some columns of the source table?. Implementing Transaction and Security Lesson 3B / Slide 3 of 25. Implementing Transaction and Security Lesson 3B / Slide...
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Collaborate Lesson 3C / Slide 1 of 22. In this section, you will learn about the following:. Collaborate Lesson 3C / Slide 2 of 22. This is the basis of the relational model.. The guaranteed access rule: Every data value in a relational database should be logically accessible by specifying a combination of the table name, the primary key value,...