By John Hales, Inc. Barcharts
Laminated speedy learn advisor for entry 2003. contains: Tables & Queries, New beneficial properties, Getting help,Standard Toolbar Icons, Terminology, Database items, Database Toolbar Icons, making a Database & tables, desk layout Toolbar, facts varieties, universal box homes, basic keys, growing Queries, question layout View,Query layout Toolbar, question layout, Specifying standards, Viewing SQL Code,Common Keyboard shortcuts, and extra.
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Which type of variable do you create in the PL/SQL block to retrieve all the rows and columns using a single select statement from the emp table? A: PL/SQL table of records. 123. Examine the employee table. ID NO 7 6 4 3 2 5 1 8 LAST_NAME Brown Wargner southall chiazza limber goldberg lomberg oliver FIRST_NAME Terry Julie david mike john Kelvin susan tracey SALARY 30000 25000 50000 32000 DEPT_NO 255 233 102 145 233 55000 145 You attempt to query the database with this command: SELECT dept_no,last_name,SUM(salary) FROM employee WHERE salary<50000 GROUP BY dept_no ORDER BY last_name; Which clause causes an error?
GROUP BY (deptno)a, (SELECT COUNT(*)total_count,SUM(sal)total_sal. emp) b; 109. In which situation would you use an outer query? A: The employee table column corresponding to the region table contain null values for rows that need to be displayed. 110. You attempt to query the database with this command: SELECT name,salary FROM employee WHERE salary= (SELECT salary FROM employee WHERE last_name= ‘Wagner’ OR dept_no=233) Why could this statement cause an error? A: A multiple row subquery is used with a single row comparison operator.
Examine the table instance chart for the patient table. Column name Key type Nulls/Unique FK table FK column Data type Length id_number last_name PK NN, U NN NUM 10 first_name Birth_date doctor_id NN VARCHAR2 25 VARCHAR2 25 DATE DOCTOR ID_NUMBER NUM 10 You need to create the patient_id_seq sequence to be used with the patient table’s primary key column. The sequence will begin with 1000, have a maximum value of 999999999 never reuse any number an increment by 1. Which statement would you use to complete this task?