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SELECT
CAST(CEILING(ABS(
AVG(CAST(salary AS FLOAT)) -
AVG(CAST(
CASE
WHEN REPLACE(CAST(salary AS VARCHAR(20)), '0', '') = '' THEN '0'
ELSE REPLACE(CAST(salary AS VARCHAR(20)), '0', '')
END AS FLOAT)
)
)) AS INT) AS Error
FROM employees;
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The Blunder
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-- MS SQL Server --
SELECT CAST(CEILING(ABS( AVG(CAST(salary AS FLOAT)) - AVG(CAST( CASE WHEN REPLACE(CAST(salary AS VARCHAR(20)), '0', '') = '' THEN '0' ELSE REPLACE(CAST(salary AS VARCHAR(20)), '0', '') END AS FLOAT) ) )) AS INT) AS Error FROM employees;