Subject: Assistance Needed with COBOL File Reading Structure Dear [Recipient's Name], I hope this message finds you well. I am currently working on a COBOL program to read a file with the following format: length1, content1, length2, content2, and so on. An example of the data in the...
READ FILE-NAME INVALID 操作1 通过主键读文件,如果主键无效读取不到文件,就执行操作。 1)直接使用read进行读,这种方式一次只能读到一条记录。一般会使用文件的主键进行读。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 MOVEIDTOPA-ID.MOVEUSERNAMETOPA-USERNAME.READPAINVALIDKEYMOVE"23"TO...
The ascending key requirements of successive record key values has been violated, or, the prime record key value has been changed by a COBOL program between successful execution of a READ statement and execution of the next REWRITE statement for that file. 22 Indexed and relative files only. In...
READ 语句的一般形式:READ 文件名 RECORD [INTO 标识符] [AT END 执行语句] , 例如: READ IN-FILE INTO TEMP-RECORD AT END STOP RUN 该语句除了将读到的数据传送到IN-RECORD之外,还传送到TEMP-RECORD中。在遇到文件尾时,程序结束运行。 4。WRITE语句:将内存中的数据输出到外部设备,主要是由WRITE 语句来完...
死锁发生的场景如下（暂不论表设计合不合理，索引合不合理，sql语句写法合不合理，分析死锁是主要目的，...
COBOL语言程序设计,许毅,第四章 数据部一,4.1 概述,1数据部的作用 数据部DATA DIVISION是整个COBOL程序中唯一描述数据的部分。凡是在程序中涉及的全部数据输入数据输出数据以及中间数据,都要在数据部中加以说明描述 两种
COBOL File Handling - Learn COBOL file handling concepts with examples. Understand how to read, write, and manage files in COBOL effectively.
files only. Indicates a sequence error. The ascending key requirements of successive record key values has been violated, or, the prime record key value has been changed by a COBOL program between successful execution of a READ statement and execution of the next REWRITE statement for that file...
READ 语句的最简单的格式为: READ 文件名 ENVIRONMENT DIVISION。 INPUT-OUTPUT SECTION。 FILE-CONTROL。 SELECT IN-FILLE ASSIGN TO 外部文件名。 为了存储读入的记录,必须在内存开辟一个与文件记录长度相等的存储区,即‘输入文件纪 录区’。每一个输入文件都有相应的‘输入文件纪录区’,与之一一对应。亦即在...
READ语句的最简单的格式为: READ 文件名 ENVIRONMENT DIVISION。 INPUT-OUTPUT SECTION。 FILE-CONTROL。 SELECT IN-FILLE ASSIGN TO 外部文件名。 为了存储读入的记录,必须在内存开辟一个与文件记录长度相等的存储区,即’输入文件纪录区’。每一个输入文件都有相应的’输入文件纪录区’,与之一一对应。亦即在数据部...