1 2 3 4 5 10Code language: SQL (Structured Query Language) (sql) In this example, we had a variable named l_counter, which is also the name of the index. The result shows that l_counter in the FOR loop hides the
PLSQL 的 for循环的小例子 开始 DECLAREv_lowerNUMBER:=1; v_upperNUMBER:=10;BEGINFORiINv_lower .. v_upper LOOP dbms_output.put_line('i is:'||i);ENDLOOP;END; 要注意,i 并没有进行事前定义。运行的结果是: anonymous block completed iis:1iis:2iis:3iis:4iis:5iis:6iis:7iis:8iis:9iis...
Oracle PL/SQL程序都是以块(block)为基本单位,整个Oracle PL/SQL块分三部分:声明部分(用declare开头)、执行部分(以 begin开头)和异常处理部分(以exception开头)。其中执行部分是必须的,其他两个部分可选。无论Oracle PL/SQL程序段的代码量有多大,其基本结构就是由这三部分组成。 2.控制结构 Oracle PL/SQL程序段...
v_upperNUMBER:=10;BEGINFORiINv_lower .. v_upper LOOP dbms_output.put_line('i is:'||i);ENDLOOP;END; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 要注意,i 并没有进行事前定义。运行的结果是: anonymous block completed iis:1iis:2iis:3iis:4iis:5iis:6iis:7iis:8iis:9iis:10 1...
This statement can be invoked within a PL/SQL procedure, function, trigger, or anonymous block. Authorization No specific authorization is required to reference a row expression within an SQL statement; however, for successful statement execution, all other authorization requirements for processing a cu...
gaussdb数据库基本兼容的pl/sql操作符、表达式,控制语句、集合和record等等, 不支持预定义的pl/sql常量和类型、子类型等。 1.9.1 pl/sql 基本语法 表1-36 pl/sql 操作符 序号oracle数据库 gaussdb数据库 1 + 支持 2 := 支持 3 => 支持 4 % 支持 5 ' 支持 6 . 支持 7 || 支持 8 / 支持 9 **...
htp.print(‘<TITLE>Embedded PL/SQL Example</TITLE>’);htp.print(‘</HEAD>’);htp.print(‘<BODY>’);htp.print(‘<H1>Employee Names</H1>’);htp.print(‘<TABLE>’);htp.print(‘‘);FOR emp_rec IN emp_cur LOOPhtp.print(‘ <TR>’);...
PlSqlStatement A represtation of a PL/SQL statement, or compound construct that can be used where a simple statement could (eg a block, if, loop etc). class PlSqlSubProgram A representation of a PL/SQL procedure or function. class PlSqlVariable A representation of a PL/SQL...
Host arrays are declared in a host environment such as an OCI or a Pro*C program and must be prefixed with a colon to distinguish them from PL/SQL collections. In the example below, an input host array is used in aDELETEstatement. At run time, the anonymous PL/SQL block is sent to...
For example, use this function as a check to exit the PLSQL block between batches when in a long running PL/SQL loop. This feature is available starting Oracle Database 19c, release update 10. SQL> select SYS_CONTEXT('USERENV', 'DRAIN_STATUS') from dual ; SYS_CONTEXT('USERENV','...