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SQL Server数据库

CREATE TABLE "KK" AS SELECT
    *
FROM
    (
        SELECT
            "路线编码",
            SUM (
                CAST ("隐患里程" AS float4)
            ) AS "隐患"
        FROM
            "BP03-安保工程审核库"
        GROUP BY
            "路线编码"
    ) A,
    (
        SELECT
            "路线编号",
            CAST ("隐患里程" AS float4)
        FROM
            "BP03闫"
    ) B
WHERE
    A ."路线编码" = B."路线编号"
AND (
    A ."隐患" = B."隐患里程"
    OR A ."隐患" <> B."隐患里程"
);
查询表格字段,字段类型,并过滤处理
SQL中的ISNULL函数介绍
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