Creating Database Table SQL Commands

Creating Database Tablessql Commandscreate Table

Using the information from Assignment 2, identify the name of the database created. Enter the command USE database_name; in the MySQL Shell to select the database. Create a table within the selected database, using a suitable entity and proper data types such as CHAR, VARCHAR, INT, and DATE. Verify the creation of the table with the SHOW tables; command. Test dropping and recreating the table to ensure proper functionality, using DROP TABLE table_name; and CREATE TABLE commands. Describe the table structure with DESCRIBE table_name; to confirm correct data types and structure.

Paper For Above instruction

Creating and managing database tables using SQL commands is fundamental to database administration and development. This process involves selecting the correct database, creating tables with appropriate data types, verifying their existence, and understanding their structure. Effective database management ensures data integrity, supports efficient querying, and facilitates scalability.

The first step involves identifying the target database. For instance, after executing the command SHOW databases;, a list like 'information_schema', 'mysql', 'performance_schema', 'sys', and 'wuv22707' might appear. Selecting the specific database, such as 'wuv22707', is attainable with the command USE wuv22707;. Using the correct database context is vital to prevent unintentional modifications to other databases.

Once the database is selected, creating a new table necessitates defining the table schema explicitly. An example table, tbl_student, can be created with data types suited for specific fields: a CHAR for fixed-length student IDs, VARCHAR for names, INT for ZIP codes, and DATE for date of birth, as shown below:

CREATE TABLE IF NOT EXISTS tbl_student (

student_ID CHAR(5),


student_FNAME VARCHAR(25),


student_LNAME VARCHAR(25),


student_ZIP INT,


student_DOB DATE


);

Verification of table creation is performed via SHOW tables;, which lists all tables in the current database. Confirming the table appears in the list indicates successful creation. To ensure the drop and re-create cycle functions correctly, execute DROP TABLE tbl_student;, verify removal with SHOW tables;, then recreate the table and verify again. This cycle not only tests proper SQL syntax but also emphasizes good database hygiene practices.

The structure of the table can be examined with the DESCRIBE tbl_student; command. It displays column names, data types, nullability, key constraints, and default values, providing insights into the schema. Properly describing tables facilitates understanding data constraints and ensures that the schema aligns with application requirements.

Throughout these operations, adherence to best practices—such as using IF NOT EXISTS and consistent naming conventions—is advised. Mastery of these fundamental SQL commands is essential for managing relational databases effectively, enabling developers and database administrators to create robust, maintainable, and scalable data systems.

References

  • MySQL. (2023). MySQL Reference Manual. Oracle. https://dev.mysql.com/doc/
  • Rob, P., & Coronel, C. (2020). Database Systems (13th ed.). Cengage Learning.
  • Elmasri, R., & Navathe, S. (2015). Fundamentals of Database Systems (7th ed.). Pearson.
  • Coronel, C., & Morris, S. (2015). Database Systems: Design, Implementation, & Management (11th ed.). Cengage.
  • Harrington, J. L. (2016). Relational Database Design and Implementation. Morgan Kaufmann.
  • Connolly, T., & Begg, C. (2014). Database Systems (6th ed.). Pearson.
  • Kumar, V., & Gupta, T. (2019). Practical SQL: A Beginner’s Guide. Apress.
  • Schneider, D. (2016). Learning SQL. O'Reilly Media.
  • Fowler, M. (2011). Patterns of Enterprise Application Architecture. Addison-Wesley.
  • Chapple, M., & Ball, T. (2022). SQL in Practice. Manning Publications.

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