Variables that are used in a block must generally be defined in the declaration section of the block unless they are global variables or package-level variables. A variable declaration consists of a name that is
Variable declaration #docslug#/ecob/ecob/V1.1.6/variable-declaration OceanBase Embedded SQL in C (ECOB) uses theDECLARE SECTIONstatement to declare the host variables. This is a special SQL statement of ECOB. Syntax: EXECSQLBEGINDECLARESECTION;...EXECSQLENDDECLARESECTION; Sample statement: EXEC...
语法格式: [ DECLARE [ < VariableDeclaration > ] [ < CursorDeclaration > ] [ < UserDefinedExceptionDeclaration > ] ] BEGIN < Statements > EXCEPTION WHEN ExceptionName [ OR ExceptionName... ] THEN < HandlerStatements >; [ WHEN ExceptionName[ OR ExceptionName... ] THEN < HandlerStatements >...
(myvar); 1 1 3 >DROPTEMPORARYVARIABLEmyvar;-- A minimalist variable declaration>DECLAREmyvar =5; >VALUES(myvar); 5-- Using a variable with an IDENTIFIER clause>DECLAREcolnameSTRING; >SETVARcolname ='c1'; >SELECTIDENTIFIER(colname)FROMVALUES(1,2)AST(c1, c2); 1 >SETVARcolname ='c2'; ...
DECLARE @value string = "overwritten declaration"; DECLARE EXTERNAL @value string = "external declaration"; @r = SELECT * FROM (VALUES(@value)) AS T(x); OUTPUT @r TO "/output/test.csv" USING Outputters.Csv(); Differences from T-SQL Unlike T-SQL, a variable must be declared and ini...
declaration 函数变量列表(变量名 类型) return_value_type 返回值类型(无返回值使用void) $body$ 表示里面引用的内容是函数逻辑块 return_value 返回值变量 注意: A. 输入参数可以有多个,输出参数也可以为多个。 B. 函数参数中使用OUT标明返回参数或者return_value_type为void时,函数逻辑块中不需要使用return进行值...
SetVariableStatement ShutdownStatement SignableElementKind SignatureStatementBase SimpleAlterFullTextIndexAction SimpleAlterFullTextIndexActionKind SimpleCaseExpression SimpleWhenClause SingleValueTypeCopyOption SizeFileDeclarationOption SoapMethod SoapMethodAction Soa...
variable_name [CONSTANT] datatype [NOT NULL] [:= | DEFAULT initial_value] 其中,变量名是在PL/SQL一个有效的标识符,数据类型必须是有效PL/SQL数据类型,或者在上一章中讨论的任何用户定义的数据类型。它们的定义一些有效变量声明如下: sales number(10, 2); ...
You can declare equivalent types within PL/SQL, or use the SQL type name in a PL/SQL variable declaration. Nested Table Example The following SQL*Plus script shows how you might declare a nested table in SQL, and use it as an attribute of an object type: ...
Assigns a value to the variable in-line. The value can be a constant or an expression, but it must either match the variable declaration type or be implicitly convertible to that type. @cursor_variable_name Is the name of a cursor variable. Cursor variable names must begin with an at (...