Question

我想在同一查询中使用多个条件，然后使用

这类：

SELECT fieldvalue 
FROM (
  SELECT jsonb_array_elements(fielddata) AS fieldvalue,
         process_id as process_id 
  FROM field
) t 
WHERE t.process_id='8fea394a83b70569432382e1dadc629b'
  AND (t.fieldvalue->>'name' = '21312ghfhgfhfghgf' AND t.fieldvalue->'value'->>'stringValue' IS NOT NULL) 
  AND (t.fieldvalue->>'name' = '211115ghfghfhfhff' AND t.fieldvalue->'value'->>'stringValue' IS NULL)

在查询FIELD中是视图，并且在字段名中具有jsonb类型的视图中的FIELDVALUE中，问题在条件分别给出结果的情况下运行

SELECT fieldvalue 
    FROM (
      SELECT jsonb_array_elements(fielddata) AS fieldvalue,
             process_id as process_id 
      FROM field
    ) t 
    WHERE t.process_id='8fea394a83b70569432382e1dadc629b'
      AND (t.fieldvalue->>'name' = '21312ghfhgfhfghgf' AND t.fieldvalue->'value'->>'stringValue' IS NOT NULL)

但是当运行两个AND时，它给出0行

SELECT fieldvalue 
    FROM (
      SELECT jsonb_array_elements(fielddata) AS fieldvalue,
             process_id as process_id 
      FROM field
    ) t 
    WHERE t.process_id='8fea394a83b70569432382e1dadc629b'
      AND (t.fieldvalue->>'name' = '21312ghfhgfhfghgf' AND t.fieldvalue->'value'->>'stringValue' IS NOT NULL) 
      AND (t.fieldvalue->>'name' = '211115ghfghfhfhff' AND t.fieldvalue->'value'->>'stringValue' IS NULL) AND ....;

Answer 1

您正在基于

查询数据

t.fieldvalue->'name'='21312ghfhgfhfghgf'和 t.fieldvalue->'name'='211115ghfghfhfhff'

表达式的计算结果为false，并且不返回任何内容。就像要水果既是香蕉又是芒果一样。
如果要查询将返回与

对应的两个值的字段

t.fieldvalue->'name'='21312ghfhgfhfghgf'和 t.fieldvalue->'name'='211115ghfghfhfhff'

然后考虑使用“ OR” 。

所以您可能要查询以下内容：

for section in 0...self.tableView.numberOfSections - 1 {
            for row in 0...self.tableView.numberOfRows(inSection: section) - 1 {
                let cell = self.tableView.cellForRow(at: NSIndexPath(row: row, section: section) as IndexPath)

                print("Section: \(section)  Row: \(row)")

            }
        }

如何在同一查询中组合AND条件

1 个答案: