Information and Communication Technology - 0417 CIE

Create A Database Structure

Bayani Gaba-gaba

Behind almost every app you use sits a database: the contacts on a phone, the stock in a shop, the members of a club. A database only works well if its structure is right from the start. Choose the wrong field type and a price loses its pennies; forget a key and two people with the same name become impossible to tell apart. Getting the structure right is the quiet skill that makes everything else, the searches, the calculations and the reports, possible later.

In this lesson you will learn how data is organised into fields and records, the difference between a flat file and a relational database, and how to pick the correct data type for every field. You will meet primary and foreign keys and see how they link two tables together, and you will design a clear data entry form. These are the foundations of the practical database papers, so master them and the rest of the Databases unit falls into place.

Manufura

  1. Create an appropriate database structure.
  2. Import data from existing files (including .csv, .txt) using specified field names to create tables Set appropriate data types to fields including text, numeric (integer, decimal, currency), date/time, Boolean/logical Set sub-types of numeric data including percentage, number of decimal places Set display format of Boolean/logical field (yes/no, true/false, checkbox) Set display format of date/time data Create and edit primary and foreign keys Create relationships between tables.
  3. Create and use a data entry form.
  4. Create a data entry form including specified fields, appropriate font styles and sizes, appropriate spacing between fields, character spacing of individual fields, use of white space, radio buttons, check boxes, drop down menus.
  5. Types of database.
  6. Characteristics, uses, advantages and disadvantages of a flat file and a relational database.
  7. Primary and foreign keys.
  8. Characteristics of primary key and foreign keys.
  9. Form design.
  10. Characteristics of good form design.

Darasin Sauti

Saurari wannan darasi a cikin manhaja

Taswirar tunani

An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.

Bude taswirar tunani a cikin manhaja

Katunan tunawa

Gwaji mai sauri kan abin da ake jarraba a wannan batu.

Yi atisayen wadannan katuna a cikin manhaja

Takardar Darasi

A database is simply an organised collection of data, and a database program is the software that stores and retrieves that data in a structured way. The structure you build decides what the database can do. A well-structured database stores each fact once, protects itself from bad data, and lets you pull out exactly the records you need in seconds. A badly structured one repeats data, allows errors in, and becomes slow and unreliable. Every later skill in this unit, searching, calculating and reporting, depends on the structure you set up here.

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Nazarin Darasi

Barka da kammala darasi akan Create A Database Structure. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

  1. In a database table, a single column of one type of data is called a: A. Record B. File C. Field D. Key Answer: C
  2. Which data type is most suitable for a field that stores a telephone number? A. Numeric integer B. Text (alphanumeric) C. Currency D. Boolean Answer: B
  3. A field that holds unique data and identifies each record is the: A. Foreign key B. Primary key C. Index field D. Validation field Answer: B
  4. Which statement about a relational database is correct? A. It stores all data in one single table B. It always searches faster than a flat file C. It stores each item of data once and links tables with relationships D. It cannot use primary keys Answer: C
  5. A validation check that makes sure a required field has not been left empty is a: A. Range check B. Length check C. Format check D. Presence check Answer: D

Yi aikin wadannan tambayoyi a cikin manhaja

Yi aikin wadannan tambayoyi a cikin manhaja

Littattafan da ake ba da shawarar karantawa

Cambridge IGCSE and O Level Information and Communication Technology
Cambridge IGCSE and O Level Information and Communication Technology
Sunaƙa: Third edition
Mai wallafa: Hodder Education
Shekara: 2021
ISBN: 978-1-3983-1854-0
Bayanan bayanin.: Endorsed coursebook covering the full 0417/0983 syllabus, theory and practical, with worked examples and exam-style questions.
Cambridge IGCSE Information and Communication Technology Theory Workbook
Cambridge IGCSE Information and Communication Technology Theory Workbook
Sunaƙa: Second edition
Mai wallafa: Hodder Education
Shekara: 2021
ISBN: 978-1-3983-1856-4
Bayanan bayanin.: Companion theory workbook with additional exercises across the syllabus theory topics.

Ƙarin koyo daga tushe na buɗe

Wasu ƙungiyoyi ne suka wallafa su ƙarƙashin lasisin buɗe, kuma muna ambaton su yadda suka nema. Hanyoyin suna buɗe shafukansu.

Yi Aikin Tambayoyin Gwaji

Kana son yin aikin tambayoyin gwaji kan Create A Database Structure? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.

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