我试图使用sed(GNU sed版本4.2.1)在文件中的每一行之前插入一行,该行的内容由字符串围绕.
输入:
truncate table ALPHA;
truncate table BETA;
delete from TABLE_CHARLIE where ID=1;
预期结果:
SELECT 'truncate table ALPHA;' from dual;
truncate table ALPHA;
SELECT 'truncate table BETA;' from dual;
truncate table BETA;
SELECT 'delete from TABLE_CHARLIE where ID=1;' from dual;
delete from TABLE_CHARLIE where ID=1;
我试图使用&符号(&)特殊字符,但这似乎不起作用.如果我在替换字符串上放了&符之后的任何内容,则输出不正确.
尝试1:
sed -e "s/\(.*\)/SELECT '&\n&/g" input.txt
output:
SELECT 'truncate table ALPHA;
truncate table ALPHA;
SELECT 'truncate table BETA;
truncate table BETA;
SELECT 'delete from TABLE_CHARLIE where ID=1;
delete from TABLE_CHARLIE where ID=1;
使用上面的代码,我得到了 …