Which statement must precede a SHOW TABLES statement to see the tables from the bikeStore database? SHOW DATABASES; USE bikeStore;
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- What is the purpose of a column alias?In the initial creation of a table, if a UNIQUE constraint is included for a composite column that requires the combination of entries in the specified columns to be unique, which of the following statements is correct? a. The constraint can be created only with the ALTER TABLE command. b. The constraint can be created only with the table-level approach. c. The constraint can be created only with the column-level approach. d. The constraint can be created only with the ALTER TABLE MODIFY command.Add a constraint to make sure the Rep_ID value entered in the BOOK_STORES table is a valid value contained in the STORE_REPS table. The Rep_ID columns of both tables were initially created as different datatypes. Does this cause an error when adding the constraint? Make table modifications as needed so that you can add the required constraint.
- What is the maximum number of columns you can define as a primary key when using the column-level approach to creating a table? a. 0 b. 1 c. 30 d. 255How many NOT NULL constraints can be created at the table level by using the CREATE TABLE command? 0 1 12 30 255What does the funnel symbol that appears next to a field’s name in the Query Builder dialog box indicate? The field is used in a SELECT statement’s ORDER BY clause. The field is used in a SELECT statement’s WHERE clause. The field is the primary key. The field is the foreign key.
- Which type of constraint can be used to make certain the category for a book is included when a new book is added to inventory?When must you define constraints at the table level rather than the column level?SQL: Dog DataIn each question below, you will define a new table based on the following tables.CREATE TABLE parents ASSELECT "abraham" AS parent, "barack" AS child UNIONSELECT "abraham" , "clinton" UNIONSELECT "delano" , "herbert" UNIONSELECT "fillmore" , "abraham" UNIONSELECT "fillmore" , "delano" UNIONSELECT "fillmore" , "grover" UNIONSELECT "eisenhower" , "fillmore";CREATE TABLE dogs ASSELECT "abraham" AS name, "long" AS fur, 26 AS height UNIONSELECT "barack" , "short" , 52 UNIONSELECT "clinton" , "long" , 47 UNIONSELECT "delano" , "long" , 46 UNIONSELECT "eisenhower" , "short" , 35 UNIONSELECT "fillmore" , "curly" , 32 UNIONSELECT "grover" , "short" , 28 UNIONSELECT "herbert" , "curly" , 31;CREATE TABLE sizes ASSELECT "toy" AS size, 24 AS min, 28 AS max UNIONSELECT "mini" , 28 , 35 UNIONSELECT "medium" , 35 , 45 UNIONSELECT "standard" , 45 , 60; Q3: SentencesThere are two pairs of siblings that have the same size. Create a table that contains a row with a string foreach of…
- SQL: Dog DataIn each question below, you will define a new table based on the following tables.CREATE TABLE parents ASSELECT "abraham" AS parent, "barack" AS child UNIONSELECT "abraham" , "clinton" UNIONSELECT "delano" , "herbert" UNIONSELECT "fillmore" , "abraham" UNIONSELECT "fillmore" , "delano" UNIONSELECT "fillmore" , "grover" UNIONSELECT "eisenhower" , "fillmore";CREATE TABLE dogs ASSELECT "abraham" AS name, "long" AS fur, 26 AS height UNIONSELECT "barack" , "short" , 52 UNIONSELECT "clinton" , "long" , 47 UNIONSELECT "delano" , "long" , 46 UNIONSELECT "eisenhower" , "short" , 35 UNIONSELECT "fillmore" , "curly" , 32 UNIONSELECT "grover" , "short" , 28 UNIONSELECT "herbert" , "curly" , 31;CREATE TABLE sizes ASSELECT "toy" AS size, 24 AS min, 28 AS max UNIONSELECT "mini" , 28 , 35 UNIONSELECT "medium" , 35 , 45 UNIONSELECT "standard" , 45 , 60;Q1: Size of DogsThe Fédération Cynologique Internationale classifies a standard poodle as over 45 cm and up to 60 cm.The sizes table…SQL: Dog DataIn each question below, you will define a new table based on the following tables.CREATE TABLE parents ASSELECT "abraham" AS parent, "barack" AS child UNIONSELECT "abraham" , "clinton" UNIONSELECT "delano" , "herbert" UNIONSELECT "fillmore" , "abraham" UNIONSELECT "fillmore" , "delano" UNIONSELECT "fillmore" , "grover" UNIONSELECT "eisenhower" , "fillmore";CREATE TABLE dogs ASSELECT "abraham" AS name, "long" AS fur, 26 AS height UNIONSELECT "barack" , "short" , 52 UNIONSELECT "clinton" , "long" , 47 UNIONSELECT "delano" , "long" , 46 UNIONSELECT "eisenhower" , "short" , 35 UNIONSELECT "fillmore" , "curly" , 32 UNIONSELECT "grover" , "short" , 28 UNIONSELECT "herbert" , "curly" , 31;CREATE TABLE sizes ASSELECT "toy" AS size, 24 AS min, 28 AS max UNIONSELECT "mini" , 28 , 35 UNIONSELECT "medium" , 35 , 45 UNIONSELECT "standard" , 45 , 60; Q2: By Parent HeightCreate a table by_parent_height that has a column of the names of all dogs that have a parent,ordered by the height…SQL: Add a table-level PRIMARY KEY constraint to the EMPLOYEE table using the ID column. The constraint should be named at creation. (Which means you'll need to drop the table, then recreate.) Create a PRIMARY KEY constraint on the DEPARTMENT table using the ID column. The constraint should be named at creation. (Which means you'll need to drop the table, then recreate.) Add a foreign key reference on the EMPLOYEE table that will ensure that the employee is not assigned to a nonexistent department. Confirm that the constraints were added by querying USER_CONSTRAINTS. Note the types and names of the constraints and include them in your statement comments. Display the object names and types from the USER_OBJECTS data dictionary view for EMPLOYEE and DEPARTMENT tables. You will want to format the columns for readability. Provide comments that include the new tables and indexes created. Modify the EMPLOYEE table by adding a SALARY column of NUMBER data type, precision 7. Confirm…
