如需使用 SQL 配接器叫用ExecuteReader作業之要求訊息架構的詳細資訊,請參閱ExecuteNonQuery、ExecuteReader 和 ExecuteScalar 作業的訊息架構。注意 在 標籤內 <Query> ,您可以指定以分號分隔的多個 SQL 語句。協調流程會取用訊息,並將其傳送至SQL Server資料庫。 來自SQL Se...
在此示例中,使用此类创建一个客户端来调用泛型操作 ExecuteReader。 public System.Data.DataSet[] ExecuteReader(string Query) 是在此示例中调用的方法,用于调用ADD_EMP_DETAILS存储过程。创建WCF 客户端以调用 ExecuteReader 操作使用WCF 客户端对 SQL Server 执行操作所需的...
sql里面嵌套子查询在DataWorks中，ScalarSubQuery不支持操作重复行。这意味着在您的SQL语句中，如果子查询...
You can use below statement to query: SELECT*FROMTestCount(5) For more complex logic, more statements, you can use another table-valued function, look at the example below: USERedgate;GOCREATEFUNCTIONdbo.TestCount_Complex (@IDint)RETURNS@Return_TestCountTABLE( IDint, C1VARCHAR(38), C2VARCHA...
This guide describes the use and formulation of queries, how to understand query execution plans, and how to affect the performance of NonStop SQL/MX databases.
// 在 SQL ⾥调⽤注册好的函数 Table res3 = tEnv.sqlQuery("SELECT HashFunction(id) FROM SourceTable"); tEnv.toDataStream(res1).print("res1=>"); tEnv.toDataStream(res2).print("res2=>"); tEnv.toDataStream(res3).print("res3=>"); ...
NativeSQLQueryScalarReturn public NativeSQLQueryScalarReturn(String alias, Type type) Method Detail getColumnAlias public String getColumnAlias() getType public Type getType() equals public boolean equals(Object o) Overrides: equals in class Object hashCode publ...
In this post, we will talk about the new optimizer rule in SQL Server 2017 – CollapseIdenticalScalarSubquery. Collapsing Subqueries I have tried different variants of scalar subqueries to make this rule work, but fortunately, the optimizer team was kind enough to guide me – a query pattern...
ODBC Scalar Functions Microsoft Access SQL supports the use of the ODBC defined syntax for scalar functions in apass-through querythat runs on Microsoft SQL Server. For example, to return all rows where the absolute value of the change in the price of a stock was greater than five, use the...
2 rows in set (0.01 sec) mysql> insert into Keywords (keyword) values (‘crash’); Query OK, 1 row affected (0.10 sec) 在MySQL Client 中测试 接着在 MySQL Client 中执行以下三个 SQL select 语句: mysql> select keyword_id from Keywords where keyword = ‘crash’; ...