SQL exercises on hospital Database: Count the number of unavailable rooms for each block in each floor
SQL hospital Database: Exercise-25 with Solution
25. From the following tables, write a SQL query to count the number of unavailable rooms for each block in each floor. Sort the result-set on block floor, block code. Return the floor ID as "Floor", block ID as "Block", and number of unavailable as "Number of unavailable rooms".
Sample table: room
Sample Solution:
SELECT blockfloor AS "Floor",
blockcode AS "Block",
count(*) "Number of unavailable rooms"
FROM room
WHERE unavailable='true'
GROUP BY blockfloor,
blockcode
ORDER BY blockfloor,
blockcode;
Sample Output:
Floor | Block | Number of unavailable rooms -------+-------+--------------------------- 1 | 2 | 1 2 | 1 | 1 2 | 2 | 1 3 | 1 | 1 3 | 3 | 1 4 | 1 | 1 4 | 3 | 1 (7 rows)
Practice Online
E R Diagram of Hospital Database:
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Previous: From the following tables, write a SQL query to count the number of available rooms for each floor in each block. Sort the result-set on floor ID, ID of the block. Return the floor ID as "Floor", ID of the block as "Block", and number of available rooms as "Number of available rooms".
Next: From the following table, write a SQL query to find the floor where the maximum numbers of rooms are available. Return floor ID as "Floor", count "Number of available rooms".
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SQL: Tips of the Day
SQL Server SELECT into existing table.
INSERT INTO dbo.TABLETWO SELECT col1, col2 FROM dbo.TABLEONE WHERE col3 LIKE @search_key
This assumes there's only two columns in dbo.TABLETWO - you need to specify the columns otherwise:
INSERT INTO dbo.TABLETWO (col1, col2) SELECT col1, col2 FROM dbo.TABLEONE WHERE col3 LIKE @search_key
Database: SQL Server
Ref: https://bit.ly/3y6tpA3
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