Oracle中空字符串''就是null(也就是说,只有null,没有空字符),而MySQL是区分null和''的。 对于使用语句:select * from table1 where user_name <> ''来查询列user_name不为空(不为null且不为空字符)时,Oracle会查不出任何结果,而MySQL可以正常运行。这里MySQL之所以可以得到正确结果,还因为比较符号<>会先将...
SSRS dataset not refreshed after changing stored procedure in VS2013 SSRS Dataset to EXEUTE a SQL Stored Procedure utilizing a Parameter SSRS Date and time Parameter SSRS Date Comparison SSRS date format in Expression Editor issue SSRS Datetime Parameter value should display in DD/MM/YYYY format SS...
Packages are a way to encapsulate procedures, functions, and data inside their own namespace with their own scope, keeping them isolated from other procedures in the global database namespace. When calling a procedure in a package, a period is used to separate package name from procedure name...
1. oracle可以将动态sql放在游标中执行. mysql游标声明有一定的局限性: mysql游标必须在声明处理程序之前被声明,并且变量和条件必须在声明光标或处理程序之前被声明。Mysql采用Prepared Statements实现动态sql. 例子如下: INT Emp_id_var = 56 PREPARE SQLSA FROM "DELETE FROM employee WHERE emp_id=?" ; EXECUTE ...
AND O.OBJECT_TYPE IN ( 'SYNONYM', 'VIEW', 'TRIGGER', 'FUNCTION', 'PROCEDURE', 'PACKAGE', 'PACKAGE BODY', 'TYPE', 'TYPE BODY' ) ORDER BY O.OWNER, O.OBJECT_ID It so happens that this 3rd party application uses loads of public synonyms. Every object in the application schemas has...
44 Oracle Database Appliance Series • February 2020 Safety Agency Compliance Statements Read this section before beginning any procedure. The following text provides safety precautions to follow when installing an Oracle product. ■ "Safety Precautions" on page 45 ■ "Conformité aux normes de ...
Follow the standard procedure in Defining MRP Names to complete this task. See Also Planner Workbench Overview of the Memory-based Planning Engine Launching the Supply Chain Planning Process Supply Chain Planning users can launch the planning process for a multi-organization material requirements plan ...
FunctionsIf the function can be directly converted to Transact-SQL, SSMA creates a function. In some cases, the function must be converted to a stored procedure. In this case, SSMA creates a stored procedure and a function that calls the stored procedure. ...
In traditional applications, procedure calls, sometimes called function calls, are used to access the devices and services of the computer on which the application is running. Opening and reading files or writing to the computer’s display or other devices are functions handled through procedure call...
Functions Packages PackageBodies Arguments UniqueKeys PrimaryKeys ForeignKeys ForeignKeyColumns ProcedureParameters Columns 列名 数据类型 说明 OWNER String 表、视图或群集的所有者。 TABLE_NAME String 表、视图或群集的名称。 COLUMN_NAME String 列名称。