17 lines
621 B
SQL
17 lines
621 B
SQL
-- Add hourly_rate to labour_entries to capture wage at time of entry
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ALTER TABLE labour_entries ADD COLUMN hourly_rate DECIMAL(10, 2) DEFAULT NULL AFTER hours;
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-- Backfill hourly_rate from employee_wages
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UPDATE labour_entries le
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JOIN (
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SELECT ew1.employee_id, ew1.hourly_rate, ew1.effective_date
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FROM employee_wages ew1
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WHERE ew1.effective_date = (
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SELECT MAX(ew2.effective_date)
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FROM employee_wages ew2
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WHERE ew2.employee_id = ew1.employee_id
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)
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) latest_wage ON le.employee_id = latest_wage.employee_id
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SET le.hourly_rate = latest_wage.hourly_rate
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WHERE le.hourly_rate IS NULL;
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