DECLARE语句通常用于定义程序块的局部变量。 DECLARE语法如下: DECLARE variable_name1 [CONSTANT] [datatype] [:= initial_value]; variable_name2 [CONSTANT] [datatype] [:= initial_value]; ... exception_name EXCEPTION; ... BEGIN -- PL/SQL code goes here ... EXCEPTION -- exception handling cod...
一.关键字DECLARE DECLARE: 申明变量。可以申明时直接可以赋值,使用set和select对变量进行赋值。申明的变量用于sql中的传参或是中间的存储使用(作用等同于JAVA程序中的变量)。注意:声明时需要指定变量的类型。 (1)申明时直接赋值: DECLARE @a int =2 select @a; (2)申明变量使用set获释select赋值: DECLARE @a ...
将变量作为OUT或IN OUT参数传递给子程序,然后在子程序内赋值。 1. 通过赋值语句为变量赋值 代码语言:javascript 代码运行次数:0 运行 AI代码解释 variable_name := expression; 例: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 DECLARE -- You can assign initial values here wages NUMBER; hours_work...
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: <variable_name> %ROWTYPE The number of variables and their data type is evaluated at...
5 rows in set (0.00 sec) 一行就是执行结果,实际的作用和使用while编写的存储过程一样,都是插入5行数据。 再来看一下第三个循环控制语句LOOP……END LOOP。编写一个存储过程程序如下: mysql>createprocedurepro12()->begin->declareiintdefault0;->loop_label: loop->insertintot1(filed)values(i);->seti...
SQL CREATEPROCEDUREdbo.MY_PACKAGE$SSMA_Initialize_PackageASBEGINEXECUTEssma_oracle.db_clean_storageEXECUTEssma_oracle.set_pv_varchar DB_NAME(),'DBO','MY_PACKAGE','SPACE',' 'EXECUTEssma_oracle.set_pv_varchar DB_NAME(),'DBO','MY_PACKAGE','UNITNAME','My Simple Package'DECLARE@temp datetime2...
PL/SQL变量 变量的作用: (在DECLARE阶段被声明) (*每一行只声明一个变量) (在执行阶段被赋予新值) (可以在PL/SQL之间传递值) (通过标准输出包可以看到结果) 变量初始化和关键字: identifier [CONSTANT] datatype [NOT NULL] [:= | DEFAULT expr]; ...
ORACLE 表名为变量create PROCEDURE up_CreateTable(tableName_in IN VARCHAR2)ASDeclare SQL_in VARCHAR2(5000);BEGINSQL_in := 'CREATE TABLE '||tableName_in||' (DM VARCHAR2(20) NOT NULL,MC VARCHAR2(60) NOT NULL,BZSM VARCHAR2(100))tablespace USERS pctf
It is very important to note thatsetXXX(String, XXX)binds using the formal parameter name of the called stored procedure.setXXXAtName(String, XXX)binds using the name of the Oracle style (:foo) parameter in the SQL string being executed. These are very different and can give very different...
The command is followed by a character string (host variable or literal) containing the SQL statement to be executed, which cannot be a query.The syntax of the EXECUTE IMMEDIATE statement follows:EXEC SQL EXECUTE IMMEDIATE { :host_string | string_literal }; In the following example, you use...