ORACLE certification preparation

1Z0-909 Practice Questions

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Exam: 1Z0-909
Provider: ORACLE
Full set: 65 questions
Last Update Check: September 26, 2026

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Examine this statement which executes successfully: Oracle 1Z0-909 question

The table is populated with a range of values including jobs for Robert, John, and Katie. Now, examine this statement and output: Oracle 1Z0-909 question

Why is an empty result set returned?

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Examine these statements issued from Session 1 which execute successfully:

Now, examine these statements issued from Session 2 which execute successfully: Session 2> BEGIN; UPDATE band SET song=CONCAT ("Here Comes the ", song) WHERE song LIKE ' %Sun ; Which two are true?

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Examine these commands which execute successfully: mYsql> CREATE TABLE income (acct_num INT, amount DECIMAL(10,2)); mysql> CREATE TRIGGER subtotal BEFORE INSERT ON income FOR EACH ROW SET @subtotal = ©subtotal + NEW.amount; Which is true for the income table?

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Examine this statement which executes successfully: CREATE TABLE 'fshop’ ('product' JSON DEFAULT NULL ) ENGINE=InnoDB; Now, examine a json value contained in the table: {"name" : "orange", "varieties" : [{"VarietyName":"Clementine", "Origin" : ["PA", "BU"] }, {"VarietyName": "tangerine", "Origin" : ["CH","JP"]>]> Which will cause documents to be indexed over the 'name' key?

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Which two statements are true about aggregate functions?

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Examine these statement which execute successfully:

Now, examine the statements executed in the mysqi command-line client:

What is true? A)

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Examine the appointments table definition which contains one million rows:

Now, examine this statement which executes successfully:

Which statement will improve query performance?

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The variables c and d are declared as integer types. Examine these initialization statements with placeholder value , which execute successfully: Now, examine this loop which executes successfully:

Which loop results in the same value of d for all valid values of ? A)

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The meeting table stores meeting schedules with participants from five continents. The participants' details are stored in another table.

You need to adjust the start_time and duration columns for optimal storage. What datatype changes would achieve this?

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Your session has sqi_mode set to default. Examine this statement which executes successfully:

Now examine this statement:

Which two changes are required to the insert statement so that it inserts the correct data? • std_id = 10301 • firstname = Mary • lastname = O'Hagen • birthdate = November 26, 1997 • reg_date = the current date

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1Z0-909 Practice Questions

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