Question

您好我需要能够连接两个表并返回第二个表作为第一个表的列。我需要创造（从属名，从属姓和依赖关系）基于最大数量depid（可以是动态的）。

提前谢谢

表1

+-------------+-------------+------------+
| employeeid  | first name  | last name  |
+-------------+-------------+------------+
|           1 | bill        | johnson    |
|           2 | matt        | smith      |
|           3 | katy        | lewis      |
+-------------+-------------+------------+

表2

+-------------------------------------------------------------------+
| employeeid |dependent id  | First Name | Last Name | Relationship |
+-------------------------------------------------------------------+
| 1               1            mary          johnson    spouse      |
| 1               2            aaron         johnson     child      |
| 2               1            eric          smith       child      |
+-------------------------------------------------------------------+

预期产出

+------------+------------+-----------+----------------------+---------------------+------------------------+----------------------+---------------------+------------------------+
| employeeid | first name | last name | dependent first name | dependent last name | dependent relationship | dependent first name | dependent last name | dependent relationship |
+------------+------------+-----------+----------------------+---------------------+------------------------+----------------------+---------------------+------------------------+
|          1 | bill       | johnson   | mary                 | johnson             | spouse                 | aaron                | johnson             | child                  |
|          2 | matt       | smith     | eric                 | smith               | child                  |                      |                     |                        |
|          3 | katty      | lewis     |                      |                     |                        |                      |                     |                        |
+------------+------------+-----------+----------------------+---------------------+------------------------+----------------------+---------------------+------------------------+

Answer 1

你可以用动态SQL＆amp;下面的XML Path示例

- 表1

CREATE TABLE＃TMP1（EMP_ID INT，NAME Char（10））插入＃TMP1 VALUES（1，'One'）插入＃TMP1值（2，'TWO'）插入＃TMP1 VALUES（3，'Three'）

- 表2

CREATE TABLE＃TMP2（EMP_ID INT，DP_ID INT，FNAME Char（10），Rel Char（10））插入＃TMP2 VALUES（1,1，'Spouse One'，'Spouse'）插入＃TMP2 VALUES（1,2，'Child One'，'Child'）插入＃TMP2 VALUES（2,1，'Child TWO'，'Child'）

宣布@CNT Int ，@ Ctr int = 0 ，@ SQL VarChar（MAX）

- 获取最大相关ID

从＃TMP2

中选择@CNT = MAX（DP_ID）

- 用于验证 选择@CNT

- 构建动态SQL以获取数据集

SET @SQL ='SELECT Emp_ID'

而@Ctr＆lt; @CNT

开始

Set @Ctr = @Ctr+1
SET @SQL = @SQL + ', ( SELECT FName+'+''''+''''+'  FROM #TMP2 Where #TMP1.EMP_ID = #TMP2.EMP_ID and #TMP2.DP_ID = '+Convert(VarChar(2),@Ctr)+' For XML Path ('+''''+''''+') ) as FName'+Convert(VarChar(2),@Ctr)
SET @SQL = @SQL + ',  ( SELECT Rel+'+''''+''''+'   FROM #TMP2 Where #TMP1.EMP_ID = #TMP2.EMP_ID and #TMP2.DP_ID = '+Convert(VarChar(2),@Ctr)+' FOR XML Path ('+''''+''''+') )  as Rel'+Convert(VarChar(2),@Ctr)

结束

SET @SQL = @ SQL +'FROM＃TMP1'

- 用于验证打印动态SQL

选择@SQL

- 执行动态SQL

EXEC（@SQL）

动态行到列中

1 个答案: