在指定的节点上执行SQL语句。一般情况下,SQL语句的执行是由集群负载自动分配到合适的节点上,execute direct主要用于数据库维护和测试。 注意事项 只有系统管理员才能执行EXECUTE DIRECT。 为了各个节点上数据的一致性,SQL语句仅支持SELECT,不允许执行事务语句、DDL、DML。 使用此类型语句在指定的DN执行AVG聚集计算
java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import java.util.List; import javax.sql.DataSource; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public final class SQLUtil { private static Log logger = LogFactory.getLog(SQL...
這可讓您在 SQL 查詢字串中使用具名參數。上下文。Database.ExecuteSqlCommand (「UPDATE dbo。文章 SET Rating = 5 WHERE Author = @author 「, new SqlParameter (」@author「, userSuppliedAuthor) ) ; ExecuteSqlCommand(TransactionalBehavior, String, Object[]) 針對資料庫執行給定的 DDL/DML 命令。 如同...
For more information, seeEXECUTE IMMEDIATE Statementin theOracle documentation. PostgreSQL usage The PostgreSQLEXECUTEcommand prepares and runs commands dynamically. TheEXECUTEcommand can also run DDL statements and retrieve data using SQL commands. Similar to Oracle, you can use the Postgre...
Execute a database command, stored procedure, or SQL query to perform a database function, return results (SELECT statements) or perform DML (INSERT, UPDATE, DELETE) operations. Retrieve output parameters from a procedure for input to a FILTER or COLMAP clause. ...
Abstract summarizes running dynamic SQL statements, DML/DDL commands with bind variables using Oracle EXECUTE IMMEDIATE, MySQL EXECUTE/PREPARE statements, enabling database migration between platforms. October 31, 2024 Discover highly rated pages
Head over and check out the full source code for the Array DML error handling example on the Embarcadero GitHub. With the use ofWindows IDE, you can execute multiple SQL commands in Delphi when developing in Delphi or C++ environments. Try yourFree Trial here. ...
These are the methods under Command Object ExecuteReader : Used to execute SQL Select Command ExecuteScalar : Used to execute SQL Select command which is used to return a single value. Example the group function output ExecuteNonQuery : USed to execute SQL Insert, Delete and Update Commands. ...
SQL Server Azure SQL Database 本節描述 的 EXECUTE ASSQL Server 語法。 函式(內嵌資料表值函式除外)、預存程式和 DML 觸發程式: syntaxsql 複製 { EXEC | EXECUTE } AS { CALLER | SELF | OWNER | 'user_name' } 具有資料庫範圍的 DDL 觸發程式: syntaxsql 複製 { EXEC | EXECUTE } AS ...
Assume that you have a table that has a DML trigger in Microsoft SQL Server 2008 R2, SQL Server 2012, or SQL Server 2014 and in that trigger you join inserted/deleted table with other tables. When you execute a DML statement on this table, an access violation may occur...