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The following COBOL program depicts the use of STRING DELIMITED BY SIZE IDENTIFICATION DIVISION. PROGRAM-ID. PGM040. AUTHOR. MAINFRAMEWIZARD. DATA DIV 阅读全文
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工作中经常在shell脚本中看到set的这两个用法,但就像生活中的很多事情,习惯导致忽视,直到出现问题才引起关注。1. set -eset命令的-e参数,linux自带的说明如下:"Exit immediately if a simple command exits with a non-zero 阅读全文
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On ROWNUM and Limiting Results On ROWNUM and Limiting Results Our technologist explains how ROWNUM works and how to make it work for you. By Tom Kyte 阅读全文
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A ResultSet object is automatically closed by the Statement object that generated it when that Statement object is closed, re-executed, or is used to 阅读全文