Download Beginning Oracle SQL, 3rd Edition: For Oracle Database 12c by Lex deHaan, Tim Gorman, Inger Jorgensen, Melanie Caffrey PDF

By Lex deHaan, Tim Gorman, Inger Jorgensen, Melanie Caffrey

Starting Oracle SQL is your creation to the interactive question instruments and particular dialect of SQL used with Oracle Database. those instruments comprise SQL*Plus and SQL Developer. SQL*Plus is the single device any Oracle developer or database administrator can regularly anticipate, and it really is general in growing scripts to automate regimen initiatives. SQL Developer is a robust, graphical surroundings for constructing and debugging queries. Oracle's is potentially the main priceless dialect of SQL from a occupation perspective. Oracle's database engine is common in company environments all over the world. it's also present in many executive purposes. Oracle SQL implements many positive factors no longer present in competing items. No developer or DBA operating with Oracle can have enough money to be with no wisdom of those good points and the way they paintings, end result of the functionality and expressiveness they carry to the desk.

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Extra resources for Beginning Oracle SQL, 3rd Edition: For Oracle Database 12c

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Info Chapter 2 ■ Introduction to SQL and SQL Developer Table 2-1. The Six Main Components of the SELECT Command Component Description FROM Which table(s) is (are) needed for retrieval? WHERE What is the condition to filter the rows? GROUP BY How should the rows be grouped/aggregated? HAVING What is the condition to filter the aggregated groups? SELECT Which columns do you want to see in the result? ORDER BY In which order do you want to see the resulting rows? ■■Tip The order of the SELECT command components as displayed in Table 2-1 is also a good order to think about them when writing SQL statements.

Every second line will now appear in a slightly darker tone for better readability as shown here. info Chapter 2 ■ Introduction to SQL and SQL Developer Figure 2-8. Zebra striped output Connecting to a Database Unlike SQL*Plus, you do not have to enter your username, password, and database name every time you connect. With SQL Developer you can have multiple connections that can be saved and organized. If you are using multiple accounts for a single database, you can have a connection created for each of those accounts.

Debug code Then you set stopping points, breakpoints, at different interesting places in your code, which show up as red points in the margin. Now run the code using the little red ladybug. Again you see the automatically provided anonymous block for running the code, input your chosen test values, and click OK. The program now provides an extra debug bar at the top for navigating through your code while debugging. The fourth icon (the red arrow pointing into the code page) means Step Into; which is most useful for stepping one statement at a time through the code; the current statement is identifiable via the red arrow in the margin.

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