以下输入数据包含带有标题信息的表属性。下面给出了预期的输出以及带有预期文本的标题和换行符。当表名称发生更改时,这是预期的。
输入数据
Table,Host,Database,Schema,column
DEPT,My Host,My Database,Integration,Deptno
EMP,My Host,My Database,stage,emp_no
EMP,My Host,My Database,stage,emp_name
预期输出:
+++ Database Column - begin ++
Table,Host,Database,Schema,column
DEPT,My Host,My Database,Integration,Deptno
+++ Database Column - end +++
+++ Database Column - begin ++
Table,Host,Database,Schema,column
EMP,My Host,My Database,stage,emp_no
EMP,My Host,My Database,stage,emp_name
+++ Database Column - end +++
答案1
也许是这样的:
awk -F, '
BEGIN {
table = 1#st field
begin = "+++ Database Column - begin +++"
end = "+++ Database Column - end +++"
}
NR == 1 {begin = begin "\n" $0; next}
$table != last_table {
if (NR > 2) print end
print begin
last_table = $table
}
{print}
END{if (NR > 1) print end}'
答案2
这是一种方法:
$ perl -ne 'BEGIN{
$header="+++ Database Column - begin +++";
$footer="+++ Database Column - end +++";
}
if($.==1){
$header.="\n$_";
next;
}
print "$header$_$footer\n"' file
+++ Database Column - begin +++
Name,Host,Database,Schema,Table,Description,ODBC Type,Data Type,Native Type
Deptno,My Host,My Database,Integration,Dept,Description of Column,INTEGER,INT16,Number
+++ Database Column - end +++
+++ Database Column - begin +++
Name,Host,Database,Schema,Table,Description,ODBC Type,Data Type,Native Type
empno,My Host,My Database,stage,emp,Description of Column,INTEGER,INT16,Number
+++ Database Column - end +++
+++ Database Column - begin +++
Name,Host,Database,Schema,Table,Description,ODBC Type,Data Type,Native Type
empname,My Host,stage,emp,Description of Column,VARCHAR,STRING,Text
+++ Database Column - end +++