根据查询结果 returns 将字符串插入 SQL table

Question

我有一些查询用于测试我运行测试的数据库结果是否没有任何明显的损坏和错误。

其中一个查询具有以下基本形式：

SELECT *
FROM Table
WHERE Column = ''

它正在检查以确保某一特定字段不为空。我想跟踪这些测试运行以及它们何时通过或失败。有没有一种方法可以让我编写一个查询，这样如果该查询返回任何结果，它就会将一个字符串写入另一个 table，类似于 "Test Passed"?

因此，伪版本可能如下所示：

IF (
    SELECT *
    FROM Table1
    WHERE Table1.Column1 = ''
) = 0
INSERT INTO Table2 (FileName, Date, Result)
VALUES ('File1', 'GetDate()', 'Test Passed')
ELSE
INSERT INTO Table2 (FileName, Date, Result)
VALUES ('File1', 'GetDate()', 'Test Failed')

table 可能如下所示：

| FileName |   Date   |    Result   |
|:--------:|:--------:|:-----------:|
| File1    | 12-25-16 | Test Passed |
| File2    | 12-25-16 | Test Failed |
| File3    | 12-25-16 | Test Passed |
| File4    | 12-25-16 | Test Passed |

Answer 1

你几乎已经在你的代码中了。只需将 SELECT * 更改为 SELECT COUNT(*) 即可。我会设置状态然后进行插入。

DECLARE @testStatus NVARCHAR(MAX);

IF (
    SELECT COUNT(*)
    FROM Table1
    WHERE Table1.Column1 = ''
) = 0
    SET @testStatus = 'Test Passed'
ELSE
    SET @testStatus = 'Test Failed'

INSERT INTO Table2 (FileName, Date, Result)
VALUES ('File1', GetDate(), @testStatus)

Answer 2

Is there a way that I can write a query so that if that query brings back any results then it writes a string to another table that says something like "Test Passed"?

进一步构建您的查询，您可以执行如下操作

--无列所以测试通过

    IF not exists ( SELECT *
        FROM Table1
        WHERE Table1.Column1 = ''
    ) 
Begin
    INSERT INTO Table2 (FileName, Date, Result)
    VALUES ('File1', 'GetDate()', 'Test Passed')
End

Answer 3

如果你只想通过查询（没有 T-SQL）获得结果，你可以使用这个解决方案：

INSERT INTO Table2(FileName, Date, Result)
  SELECT 'File1', GetDate(), X.Result FROM (
    SELECT 'Test passed' Result
       WHERE EXISTS(SELECT * FROM Table1 WHERE Column1 = '')
    UNION ALL      
    SELECT 'Test failed'
       WHERE NOT EXISTS (SELECT * FROM Table1 WHERE Column1 = '')
  ) X

稍加努力，您也可以编写相同查询的 Oracle 版本：

INSERT INTO Table2(FileName, Date, Result)
  SELECT 'File1', sysdate, X.Result FROM (
    SELECT 'Test passed' Result FROM dual
       WHERE EXISTS(SELECT * FROM Table1 WHERE Column1 = '')
    UNION ALL      
    SELECT 'Test failed' FROM dual
       WHERE NOT EXISTS (SELECT * FROM Table1 WHERE Column1 = '')
  ) X

Answer 4

MERGE 
   table2 AS target
USING 
   table1 AS source
ON 
   source.Column1 = ''
WHEN MATCHED THEN 
   INSERT INTO target (FileName, Date, Result)
   VALUES ('File1', 'GetDate()', 'Test Failed')
WHEN NOT MATCHED THEN 
   INSERT INTO target (FileName, Date, Result)
   VALUES ('File1', 'GetDate()', 'Test Passed')

根据查询结果 returns 将字符串插入 SQL table

Inserting strings into an SQL table depending on what results a query returns

sql

sql-server

if-statement

insert-into