Fix Try It Yourself Chapter 9 answer
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@ -484,7 +484,7 @@ SELECT pls18.stabr,
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round( (sum(pls18.totstaff::numeric) - sum(pls17.totstaff)) /
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round( (sum(pls18.totstaff::numeric) - sum(pls17.totstaff)) /
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sum(pls17.totstaff) * 100, 1 ) AS chg_2018_17,
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sum(pls17.totstaff) * 100, 1 ) AS chg_2018_17,
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round( (sum(pls17.totstaff::numeric) - sum(pls16.totstaff)) /
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round( (sum(pls17.totstaff::numeric) - sum(pls16.totstaff)) /
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sum(pls16.hrs_open) * 100, 1 ) AS chg_2017_16
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sum(pls16.totstaff) * 100, 1 ) AS chg_2017_16
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FROM pls_fy2018_libraries pls18
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FROM pls_fy2018_libraries pls18
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JOIN pls_fy2017_libraries pls17 ON pls18.fscskey = pls17.fscskey
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JOIN pls_fy2017_libraries pls17 ON pls18.fscskey = pls17.fscskey
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JOIN pls_fy2016_libraries pls16 ON pls18.fscskey = pls16.fscskey
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JOIN pls_fy2016_libraries pls16 ON pls18.fscskey = pls16.fscskey
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