<variable>%TYPE | %TYPE | %ROWTYPE} [ [NOT NULL] {:= | DEFAULT} <expr> ] The <field_type> can be any PL/SQL data type except REF CURSOR. To declare a record variable: <variable_identifier> <type_name>; You can declare a variable based on a record reference using %ROWTYPE: <...
A stored function cannot return a LONG value. You can declare a variable or argument of a PL/SQL program unit using the LONG datatype. However, you cannot then call the program unit from SQL. Within a single SQL statement, all LONG columns, updated tables, and locked tables must be loca...
当一个SQL语句提交后,Oracle 在接收到这些SQL后,会先对这个SQL做一个hash 函数运算,得到一个Hash值,然后到共享池中寻找是否有和这个hash 值匹配的SQL存在。 如果找到了,Oracle将直接使用已经存在的SQL 的执行计划去执行当前的SQL,然后将结果返回给用户。 如果在共享池中没有找到相同Hash 值的SQL,oracle 会认为这...
示例说明了表的在线重新定义。 对于以下示例,请参阅_[Oracle Database PL/SQL Packages and Types Reference](https://docs.oracle.com/en/database/oracle/oracle-database/19/arpls/DBMS_REDEFINITION.html#GUID-045732D9-6831-4411-BE1C-6FCB2A1F99B9)以了解所有DBMS_REDEFINITION子程序的描述。 例子 通过...
TheDBMS_SQLpackage has been enhanced to support more bind variable types. TheDESC_REC4RECORD Type andDESC_TAB4TABLE Type are introduced to support longer identifiers. See BIND_VARIABLE Procedures VARIABLE_VALUE Procedures BIND_VARIABLE_PKG Procedure(new) ...
Bind Variable Support Drag and Drop into your SQL Snippets Tables/Materialized Views (bring over full select statement) Functions/Procedures (bring over full parameter list) All other objects from Connections SQL from Reports Any files opened will be opened into a SQL Worksheet. The user will simp...
Bind Variable Support Drag and Drop into your SQL Snippets Tables/Materialized Views (bring over full select statement) Functions/Procedures (bring over full parameter list) All other objects from Connections SQL from Reports Any files opened will be opened into a SQL Worksheet. The user will simp...
2.1 Alphabetic List of SQLcl Commands @{url | file_name[.ext]} [arg ...] @@ { url | file_name[.ext] } [arg ...] / (slash) ACC[EPT] variable [NUM[BER] | CHAR | DATE | BINARY_FLOAT | BINARY_DOUBLE] [FOR[MAT] format] [DEF[AULT] default] [PROMPT text | NOPR[OMPT]...
Here are the key differences between collections and records in PL/SQL. Collections Records All items are of the same data type All items are different data types Same data type items are called elements Different data type items are called fields Syntax: variable_name(index) Syntax: variable_...
出于可维护性目的,可以在'variable-group'元素内声明变量,以便对用户定义的变量进行逻辑隔离。 并不要求必须使用此元素。 示例: 示例1: <!--Sample of variable value file commands--> <variables> <variable-group name="ProjectSpecs"> <variable name="$project_folder$" value="<project-folder>"/> <vari...