将列值分隔为两列作为记录

Question

我想得到表B.如何在MSSQL中编写选择查询

Answer 1

您可以使用存储过程复制另一个表中的记录。

CREATE PROCEDURE [dbo].[CopyRecords]
(@TableBID int)
AS
BEGIN
INSERT INTO [TableB]
    ([EffectiveDate],[EmployeeName],
    [Title],[Department]) --- Columns of TableB table

SELECT [EffectiveDate],[EmployeeName],
    [FieldValue],[FieldType] ---Columns of TableA table
FROM [TableA]
WHERE TableAID = @TableBID --- Where value of TableAID of TableA table matches the value of @TableAID
END

Answer 2

您可以通过条件聚合来实现这一目标。

    SELECT [EFFECTIVE DATE],[EMPLOYEE NAME],
    MAX(CASE WHEN FieldType = 'Title' THEN FIELDVALUE end) as Title,
    MAX(CASE WHEN FieldType = 'Department' THEN FIELDVALUE end )as department
    from table_a group by [EMPLOYEE NAME],[EFFECTIVE DATE]

Answer 3

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