SQL Ch4 Review
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| To retrieve data from more than one table, you must ___ the tables together by finding rows in the two tables that have identical values in matching columns. | show 🗑
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| Another word for joining the tables is to ___. | show 🗑
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| show | qualify
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| show | WHERE
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| show | EXISTS, IN
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| A ___ is a query that involves a table listed in the outer query. | show 🗑
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| A subquery within a subquery is known as a ____. | show 🗑
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| show | innermost, outermost
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| An alternate name that you can use in the rest of a statement is known as a ___. | show 🗑
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| If the query is complex and requires you to qualify the names, using ____ can simplify the process. | show 🗑
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| show | self-join
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| In SQL, you can use the set operations for taking the ____,____,____ of two tables. | show 🗑
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| show | union
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| show | intersection(intersect)
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| show | difference(minus)
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| show | union compatible
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| show | duplicate
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| You can use the ___ and ___ operators with subqueries to produce a single column of numbers. | show 🗑
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| A join that compares the tables in the FROM clause and lists only those rows that satisfy the condition in the WHERE clause is called a(n) ___ ___. | show 🗑
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| show | outer join
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| show | left outer join, right outer join, full outer join
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| show | left outer join
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| In a ___ ___ __, all rows from the table on the right will be included regardless of whether they match rows from the table on the left. | show 🗑
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| show | full outer join
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| show | product, Cartesian Product
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| show | WHERE
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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kat1350
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