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CREATE TABLE "test" ( "FromDate" TEXT, "ToDate" TEXT )
✓
INSERT INTO "test" ("FromDate","ToDate") VALUES ('2000-02-10','2020-03-24');
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SELECT (CASE CAST(strftime('%m',ToDate) AS INT)<CAST(strftime('%m',FromDate) AS INT) OR (CAST(strftime('%m',ToDate) AS INT)=CAST(strftime('%m',FromDate) AS INT) AND CAST(strftime('%d',ToDate) AS INT)<CAST(strftime('%d',FromDate) AS INT)) WHEN TRUE THEN CAST(strftime('%Y',ToDate) AS INT)-CAST(strftime('%Y',FromDate) AS INT)-1 ELSE CAST(strftime('%Y',ToDate) AS INT)-CAST(strftime('%Y',FromDate) AS INT) END) AS Years, (CASE WHEN CAST(strftime('%m',ToDate) AS INT)<CAST(strftime('%m',FromDate) AS INT) THEN CASE WHEN CAST(strftime('%d',ToDate) AS INT)<CAST(strftime('%d',FromDate) AS INT) THEN CASE WHEN 12+CAST(strftime('%m',ToDate) AS INT)-CAST(strftime('%m',FromDate) AS INT)=0 THEN 11 ELSE 11+CAST(strftime('%m',ToDate) AS INT)-CAST(strftime('%m',FromDate) AS INT) END ELSE 12+CAST(strftime('%m',ToDate) AS INT)-CAST(strftime('%m',FromDate) AS INT) END ELSE CASE WHEN CAST(strftime('%d',ToDate) AS INT)<CAST(strftime('%d',FromDate) AS INT) THEN CASE WHEN CAST(strftime('%m',ToDate) AS INT)-CAST(strftime('%m',FromDate) AS INT)=0 THEN 11 ELSE CAST(strftime('%m',ToDate) AS INT)-CAST(strftime('%m',FromDate) AS INT)-1 END ELSE CAST(strftime('%m',ToDate) AS INT)-CAST(strftime('%m',FromDate) AS INT) END END) AS Months , (CASE WHEN CAST(strftime('%d',ToDate) AS INT)>=CAST(strftime('%d',FromDate) AS INT) THEN CAST(strftime('%d',ToDate) AS INT)-CAST(strftime('%d',FromDate) AS INT) ELSE CAST(strftime('%d',ToDate) AS INT)+(CAST(strftime('%d',Date(FromDate,'start of month','+1 months','-1 day')) AS INT)-CAST(strftime('%d',FromDate) AS INT)) END) AS Days FROM Test
Years
Months
Days
20
1
14