存储过程(Stored Procedure)是在大型数据库系统中,一组为了完成特定功能的SQL语句集,存储在数据库中。经过第一次编译后再次调用不需要再次编译,用户通过指定存储过程的名字并给出参数(如果该存储过程带有参数)来执行它。 存储过程是数据库中的一个重要对象,任何一个设计良好的数据库应用程序都应该用到存储过程。 2. ...
dacommand.CommandType=CommandType.StoredProcedure; IDictionaryEnumerator Enumerator; Enumerator = HT.GetEnumerator(); object Value=null; OracleParameter OracleParam; OracleParam = dacommand.Parameters.Add(new OracleParameter(ReturnParameter,ParamType)); OracleParam.Direction = ParameterDirection.Output; while(En...
PostgreSQL Stored ProceduresLearn how to store SQL functions in your CARTO database.What is a stored procedure?PostgreSQL allows you to extend the database functionality with user-defined functions by using various procedural languages, which are often referred to as stored procedures....
创建复杂的过程和函数,称为存储过程(Stored Procedure)和自定义函数(User-Defined Function)。 存储过程支持许多过程元素,例如控制结构、循环和复杂的计算。 注: 博客: https://blog.csdn.net/badao_liumang_qizhi 实现 1、PL/pgSQL 代码块结构 [ <> ] [ DECLARE...
Functions return only a single valueStored procedures return a single or multiple values Functions can only have input parametersStored procedures can have both input and output parameters We can use functions in a SELECT statementStored procedures can’t be used in a SELECT statement ...
<Select CommandName="AddGuanZhuDu"Method=""CommandType="StoredProcedure"Description="增加关注度"ResultClass="ValueType"><![CDATA[UpdateFundAttention #jjdm:String#]]></Select>修改成下面的方式:<Select CommandName="AddGuanZhuDu"Method=""CommandType="Text"Description="增加关注度"ResultClass="ValueType">...
para.Value = "KF0355"; int count= db.ExecuteNonQuery("updatefundattention", System.Data.CommandType.StoredProcedure, new System.Data.IDataParameter[] { para }); 运行该存储过程,出现下面的错误: DataBase ErrorMessage:ERROR: 42883: function updatefundattention(text) does not existSQL:updatefundattenti...
Calling stored procedure with transaction control PostgreSQL supports two types of stored objects, functions that can return a result value and - starting from v11 - procedures that can perform transaction control. Both types of stored objects are invoked usingCallableStatementand the standard JDBC esca...
sp_fkeys stored procedure now also returns 'deferrability' column in the result set. Fixed an issue in AVG aggregates which led to the termination of the connection for some integer datatypes. The index_id and indid column for respective views now returns the same value for indexes belonging...
概述 在PostgreSQL中,除了标准 SQL 语句之外还支持使用各种过程语言(例如 PL/pgSQL、C、PL/Tcl、PL/Python、PL/Perl、PL/Java 等 )创建复杂的过程和函数,称为存储过程(Stored Procedure)和自定义函数(User-Defined Function)。存储过程支持许多过程元素,例如控制结构、循环和复杂的计算。 使用存储过程带来的好处包括...