Postgresql 从多个表中加减多列POSTGRES 表1 Sumcol_索赔=100

表2 Sumcol_索赔=50

表3SUMCOLU释放=75

表4SUMCOL_发布二=25

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结果=100+50-75+25=50

只需内联子查询并执行算术：

SELECT
    (SELECT SUM(col_claim) FROM table1) +
    (SELECT SUM(col_claim) FROM table2) -
    (SELECT SUM(col_release) FROM table3) -
    (SELECT SUM(col_release_two) FROM table4) AS result;

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大多数人更喜欢样本数据

SELECT
    (SELECT SUM(col_claim) FROM table1) +
    (SELECT SUM(col_claim) FROM table2) -
    (SELECT SUM(col_release) FROM table3) -
    (SELECT SUM(col_release_two) FROM table4) AS result;