I am getting some spaces between the two lines(rows) in file.i want delete that empty rows in the file
example
1 abc xyz
2 def jkl
like i am having lots of rows in a file i want to delete the spce between the two rows give any... (7 Replies)
Hello,
I am supposed to process about 100 csv files. But these files have some extra lines at the bottom of the file. these extra lines start with a header for each column and then some values below. These lines are actually a summary of the actual data and not supposed to be processed. These... (8 Replies)
Hi Guys,
I need help in modifying a large text file containing more than 1-2 lakh rows of data using unix commands. I am quite new to the unix language
the text file contains data in a pipe delimited format
sdfsdfs
sdfsdfsd
START_ROW
sdfsd|sdfsdfsd|sdfsdfasdf|sdfsadf|sdfasdf... (9 Replies)
Fruit : Price : Quantity
apple : 20 : 40
chiku : 40 :30
Hey guys, i have written a code using sed to delete a specific char which is being typed in. But the problem i am having is , how can i expand my coding to actually allow it do delete the whole row. For example,... (21 Replies)
I have this space delimited large text file with more than 1,000,000+ columns and about 100 rows. I want to delete all the cells that consist of just 2 (leave 2's that are not by themselves intact):
File before modification
aa bb cc 2 NA100 dd
aa b1 c2 2 NA102 de
File after modification... (1 Reply)
I know this is a complicated question but I will try to illustrate it with some data. I have a data file that looks like the following:
1341 NA06985 0 0 2 46.6432798439
1341 NA06991 NA06993 NA06985 2 48.8478948517
1341 NA06993 0 0 1 45.8022601455
1340 NA06994 0 0 1 48.780669145
1340... (1 Reply)
Hi,
I have a tab delimited text file where I want to delete all rows that have the same string for column 1. How do I go about doing that? Thanks!
Example Input:
aa 1
aa 2
aa 3
bb 4
bc 5
bb 6
cd 8
Output:
bc 5
cd 8 (4 Replies)
Hi,
I'm trying to search for some number and from that line, i need to delete the 5th line exactly.
Eg:
Consider below as text file data:
10000
a
b
c
d
e
.
.
.
10000
w
q
t (8 Replies)
Discussion started by: Gautham
8 Replies
LEARN ABOUT CENTOS
dblink_get_result
DBLINK_GET_RESULT(3) PostgreSQL 9.2.7 Documentation DBLINK_GET_RESULT(3)NAME
dblink_get_result - gets an async query result
SYNOPSIS
dblink_get_result(text connname [, bool fail_on_error]) returns setof record
DESCRIPTION
dblink_get_result collects the results of an asynchronous query previously sent with dblink_send_query. If the query is not already
completed, dblink_get_result will wait until it is.
ARGUMENTS
conname
Name of the connection to use.
fail_on_error
If true (the default when omitted) then an error thrown on the remote side of the connection causes an error to also be thrown locally.
If false, the remote error is locally reported as a NOTICE, and the function returns no rows.
RETURN VALUE
For an async query (that is, a SQL statement returning rows), the function returns the row(s) produced by the query. To use this function,
you will need to specify the expected set of columns, as previously discussed for dblink.
For an async command (that is, a SQL statement not returning rows), the function returns a single row with a single text column containing
the command's status string. It is still necessary to specify that the result will have a single text column in the calling FROM clause.
NOTES
This function must be called if dblink_send_query returned 1. It must be called once for each query sent, and one additional time to obtain
an empty set result, before the connection can be used again.
When using dblink_send_query and dblink_get_result, dblink fetches the entire remote query result before returning any of it to the local
query processor. If the query returns a large number of rows, this can result in transient memory bloat in the local session. It may be
better to open such a query as a cursor with dblink_open and then fetch a manageable number of rows at a time. Alternatively, use plain
dblink(), which avoids memory bloat by spooling large result sets to disk.
EXAMPLES
contrib_regression=# SELECT dblink_connect('dtest1', 'dbname=contrib_regression');
dblink_connect
----------------
OK
(1 row)
contrib_regression=# SELECT * FROM
contrib_regression-# dblink_send_query('dtest1', 'select * from foo where f1 < 3') AS t1;
t1
----
1
(1 row)
contrib_regression=# SELECT * FROM dblink_get_result('dtest1') AS t1(f1 int, f2 text, f3 text[]);
f1 | f2 | f3
----+----+------------
0 | a | {a0,b0,c0}
1 | b | {a1,b1,c1}
2 | c | {a2,b2,c2}
(3 rows)
contrib_regression=# SELECT * FROM dblink_get_result('dtest1') AS t1(f1 int, f2 text, f3 text[]);
f1 | f2 | f3
----+----+----
(0 rows)
contrib_regression=# SELECT * FROM
contrib_regression-# dblink_send_query('dtest1', 'select * from foo where f1 < 3; select * from foo where f1 > 6') AS t1;
t1
----
1
(1 row)
contrib_regression=# SELECT * FROM dblink_get_result('dtest1') AS t1(f1 int, f2 text, f3 text[]);
f1 | f2 | f3
----+----+------------
0 | a | {a0,b0,c0}
1 | b | {a1,b1,c1}
2 | c | {a2,b2,c2}
(3 rows)
contrib_regression=# SELECT * FROM dblink_get_result('dtest1') AS t1(f1 int, f2 text, f3 text[]);
f1 | f2 | f3
----+----+---------------
7 | h | {a7,b7,c7}
8 | i | {a8,b8,c8}
9 | j | {a9,b9,c9}
10 | k | {a10,b10,c10}
(4 rows)
contrib_regression=# SELECT * FROM dblink_get_result('dtest1') AS t1(f1 int, f2 text, f3 text[]);
f1 | f2 | f3
----+----+----
(0 rows)
PostgreSQL 9.2.7 2014-02-17 DBLINK_GET_RESULT(3)