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backend/database/migrations/003_simplify_chicken_counting.sql

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+-- Migration: Simplify chicken counting to a single upsert table
+-- Date: 2026-03-05
+
+CREATE TABLE IF NOT EXISTS chicken_counting (
+    id SERIAL PRIMARY KEY,
+    date DATE NOT NULL,
+    kandang_id INTEGER NOT NULL REFERENCES kandangs(id) ON DELETE CASCADE,
+    filename TEXT,
+    total_count INTEGER NOT NULL DEFAULT 0,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(date, kandang_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_chicken_counting_date ON chicken_counting(date);
+CREATE INDEX IF NOT EXISTS idx_chicken_counting_kandang_id ON chicken_counting(kandang_id);
+
+-- Auto-update updated_at trigger
+CREATE TRIGGER update_chicken_counting_updated_at
+    BEFORE UPDATE ON chicken_counting
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();