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Chapter 2: SQL – The Basics

Chapter 2: SQL – The Basics. Objectives: The SQL execution environment SELECT statement SQL Developer & SQL*Plus. Overview: SQL execution environment. Oracle can run on many different OS Oracle databases server is where the Oracle DB software resides

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Chapter 2: SQL – The Basics

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  1. Chapter 2: SQL – The Basics Objectives: The SQL execution environment SELECT statement SQL Developer & SQL*Plus

  2. Overview: SQL execution environment • Oracle can run on many different OS • Oracle databases server is where the Oracle DB software resides • Oracle provides SQL Developer & SQL*Plus tools/interfaces for connecting with the DB & executing your SQL queries • Other third party tools are available that are mentioned on Appendix H of the textbook

  3. Let’s get started… • Execution environment & setting up STUDENT schema • Accessing Oracle database server • Getting started with SQL Developer • SQL and the Oracle database server • Creating a database connection for SQL Developer • Exploring database table objects • Columns tab • Data tab • Grants tab • Statistics tab • Triggers, dependencies, indexes, flashbacks, and SQL tabs • Details tab • SQL Developer worksheet • Results tab

  4. Various SQL Developer Panes

  5. Data types A data type determines the type of data that can be stored in a column. You must keep data types in mind especially when using comparison operators, in other words, comparing the values in two columns. • DATE • NUMBER • CHAR • VARCHAR2

  6. SQL SELECT statement • Components of a SELECT statement • Selecting one, multiple or all columns • Eliminating duplicates with DISTINCT or UNIQUE

  7. SQL Worksheet Icons • Constructing & formatting SQL SELECT statement in SQL Developer • Execute Statement • Run Script • Commit • Rollback • Cancel • Execute Explain Plan • Auto Trace • Clear

  8. Formatting SQL statement in SQL Developer • Syntax formatting • Code completion • Syntax highlighting • Writing multiple statements in the SQL Developer • SQL statement history in SQL Developer

  9. SQL*Plus • Starting SQL*Plus • Executing SQL commands in SQL*Plus • Formatting SQL*Plus results

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