Question

我有DDL：

drop table names
drop table salary

create table names(
id int, 
name1 varchar(50),
char1 varchar(50),
char2 varchar(50))

insert into names values (1,'name1','char1','chara'),
                         (2,'name2','char2','charb'),
                         (3,'name3','char3','charc'),
                         (4,'name4','char4','chard'),
                         (5,'name5','char5','charf');

create table salary(
id int, 
salary int,
bonus int,
oldsalary int)

insert into salary values (1,500,245,354),
                         (2,600,345,246),
                         (3,60,365,334),
                         (4,55,545,364),
                         (5,25,345,374);

并拥有许多SQL查询（其中之一）

    SELECT n.name1,
       s.salary,
       s.bonus,
       ( s.bonus + s.salary ) AS Sumsalary
FROM   names n
       INNER JOIN salary s
               ON n.id = s.id

我想编写select查询，该查询从SQL查询中使用的表中检索所有字段名除以此选择查询中的用法以及屏幕截图中提到的一些其他信息。

我想从此查询中检索的数据格式：

Answer 1

你可以获得表格和列表如果您有权访问系统视图，则查询列：

;WITH XMLNAMESPACES ('http://schemas.microsoft.com/sqlserver/2004/07/showplan' AS ns)
SELECT DISTINCT st.TEXT AS QueryText, 
                C.value('./@Table', 'varchar(50)') As Tab,
                C.value('./@Column', 'varchar(50)') As Col
FROM sys.dm_exec_cached_plans AS cp
CROSS APPLY sys.dm_exec_query_plan(cp.plan_handle) AS qp
CROSS APPLY sys.dm_exec_sql_text(cp.plan_handle) AS st
CROSS APPLY query_plan.nodes('//ns:ColumnReference') as T(C)
WHERE cp.ObjType = 'Adhoc' AND
      St.Text Like '%s.bonus%' AND
      st.Text Not Like '%WITH XMLNAMESPACES%' AND 
      C.value('./@Table', 'varchar(50)') IS NOT NULL

这给出了以下结果：

QueryText            Tab       Col
SELECT n.name1, ...  [Names]   id
SELECT n.name1, ...  [Names]   name1
SELECT n.name1, ...  [Salary]  bonus
SELECT n.name1, ...  [Salary]  id
SELECT n.name1, ...  [Salary]  salary

然后，您可以将这些结果用作链接到sys.columns的方法，以确定哪些库存丢失等。

如何转换选择查询

1 个答案: