There are four kinds of exceptions in PL/SQL: Named system exceptions. Exceptions that have been given names by PL/SQL and raised as a result of an error in PL/SQL or RDBMS processing. Named programmer-defined
展示当前租户下的所有 PL/SQL 数据类型的信息。 功能适用性 该视图仅适用于 OceanBase 数据库 Oracle 模式。 字段说明 字段名称类型是否可以为 NULL描述 OWNER VARCHAR2(128) YES 包含PL/SQL 类型的所有者的用户名。 TYPE_NAME VARCHAR2(136) NO PL/SQL 类型的名称。 PACKAGE_NAME VARCHAR2(128) YES PL/SQL...
Types of Strings in PL/SQL There are three types of strings on PL/SQL: Fixed length string Variable length string Character large objects (CLOBs) 1) Fixed length strings In these types of strings, we the coders specify the length of Strings. If the length of string entered by user is ...
Explicit Cursors are those cursors that are defined by programmers to have more control over the Context Area (where the results of SQL queries are stored). These cursors need to be first defined in the declaration block of the PL/SQL program. It is created for the SQL statements that ...
This section describes the migration syntax of Oracle PL/SQL Collections. The migration syntax decides how the keywords/features are migrated.A user-defined type (UDT) is
Hello Reader Welcome to the World of PL/SQL PL/SQL procedure successfully completed. NULLs in PL/SQL PL/SQL NULL values representmissingorunknown dataand they are not an integer, a character, or any other specific data type. Note thatNULLis not the same as an empty data string or the nu...
Where size is the number of characters to store. Variable-length NLS string. varchar2(size) Maximum size of 4000 bytes. Maximum size of 32KB in PLSQL. Maximum size of 4000 bytes. Maximum size of 32KB in PLSQL. Maximum size of 4000 bytes. Maximum size of 32KB in PLSQL. Where size is...
andBINARY_DOUBLEcomputations do not raise exceptions, so you must check the values that they produce for conditions such as overflow and underflow by comparing them to predefined constants (for examples, seeOracle Database SQL Language Reference). PL/SQL has more of these constants than SQL does...
Each variable in PL/SQL has a specific data type, which determines the size and the layout of the variable's memory; the range of values that can be stored within that memory and the set of operations that can be applied to the variable....
Components of an Object Type An object type encapsulates data and operations. You can declare attributes and methods in an object type spec, butnotconstants, exceptions, cursors, or types. You must declare at least one attribute (the maximum is 1000). Methods are optional. ...