SQL INSERT CLAUSE

Question

我有以下INSERT语句：

INSERT INTO REVISIONS (PART ,REVNUM ,REV ,REVDATE ,T$PROC ,FATQUANT ,VALIDDATE , SERIALNAME , FROMDATE ,TILLDATE ,REVDES,
                        NEXTSIGN ,CONFIRMED ,ECO,PARTREV )
SELECT PART ,1,REV + row_number() over (order by (select NULL)),0,0,0,0,' ',14770080 ,32610240 ,'tsrif',1,' ' ,32,0
FROM PART  
WHERE LEFT(PARTNAME,4) IN ('1089','1113');

我有620条记录符合WHERE子句但只插入了456条记录。 我无法弄清楚原因。