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Top Forums Shell Programming and Scripting Remove the values from a certain column without deleting the Column name in a .CSV file Post 302880263 by Akshay Hegde on Wednesday 18th of December 2013 12:05:43 PM
Old 12-18-2013
Using awk

Code:
$ cat file
name1,name2,name3,name4,name5,name6,name7,name8,name9,name10
val1,val2,val3,val4,val5,val6,val7,val8,val9,val10
valx1,valx2,valx3,valx4,valx5,valx6,valx7,valx8,valx9,valx10
valy1,valy2,valy3,valy4,valy5,valy6,valy7,valy8,valy9,valy10
valz1,valz2,valz3,valz4,valz5,valz6,valz7,valz8,valz9,valz10

Code:
$ awk 'NR>1{$4=""}1' FS=, OFS=, file
name1,name2,name3,name4,name5,name6,name7,name8,name9,name10
val1,val2,val3,,val5,val6,val7,val8,val9,val10
valx1,valx2,valx3,,valx5,valx6,valx7,valx8,valx9,valx10
valy1,valy2,valy3,,valy5,valy6,valy7,valy8,valy9,valy10
valz1,valz2,valz3,,valz5,valz6,valz7,valz8,valz9,valz10

 

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MAXDB_STMT_EXECUTE(3)							 1						     MAXDB_STMT_EXECUTE(3)

maxdb_stmt_execute - Executes a prepared Query

       Procedural style

SYNOPSIS
bool maxdb_stmt_execute (resource $stmt) DESCRIPTION
Object oriented style bool maxdb_stmt::execute (void ) The maxdb_stmt_execute(3) function executes a query that has been previously prepared using the maxdb_prepare(3) function represented by the $stmt resource. When executed any parameter markers which exist will automatically be replaced with the appropiate data. If the statement is UPDATE, DELETE, or INSERT, the total number of affected rows can be determined by using the maxdb_stmt_affected_rows(3) function. Likewise, if the query yields a result set the maxdb_fetch(3) function is used. Note When using maxdb_stmt_execute(3), the maxdb_fetch(3) function must be used to fetch the data prior to preforming any additional queries. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Object oriented style <?php $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB"); /* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s ", maxdb_connect_error()); exit(); } $maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city"); /* Prepare an insert statement */ $query = "INSERT INTO temp.mycity (zip, name, state) VALUES (?,?,?)"; $stmt = $maxdb->prepare($query); $stmt->bind_param("sss", $val1, $val2, $val3); $val1 = '11111'; $val2 = 'Georgetown'; $val3 = 'NY'; /* Execute the statement */ $stmt->execute(); $val1 = '22222'; $val2 = 'Hubbatown'; $val3 = 'CA'; /* Execute the statement */ $stmt->execute(); /* close statement */ $stmt->close(); /* retrieve all rows from myCity */ $query = "SELECT zip, name, state FROM temp.mycity"; if ($result = $maxdb->query($query)) { while ($row = $result->fetch_row()) { printf("%s (%s,%s) ", $row[0], $row[1], $row[2]); } /* free result set */ $result->close(); } /* remove table */ $maxdb->query("DROP TABLE temp.mycity"); /* close connection */ $maxdb->close(); ?> Example #2 Procedural style <?php $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB"); /* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s ", maxdb_connect_error()); exit(); } maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city"); /* Prepare an insert statement */ $query = "INSERT INTO temp.mycity (zip, name, state) VALUES (?,?,?)"; $stmt = maxdb_prepare($link, $query); maxdb_stmt_bind_param($stmt, "sss", $val1, $val2, $val3); $val1 = '11111'; $val2 = 'Georgetown'; $val3 = 'NY'; /* Execute the statement */ maxdb_stmt_execute($stmt); $val1 = '22222'; $val2 = 'Hubbatown'; $val3 = 'CA'; /* Execute the statement */ maxdb_stmt_execute($stmt); /* close statement */ maxdb_stmt_close($stmt); /* retrieve all rows from myCity */ $query = "SELECT zip, name, state FROM temp.mycity"; if ($result = maxdb_query($link, $query)) { while ($row = maxdb_fetch_row($result)) { printf("%s (%s,%s) ", $row[0], $row[1], $row[2]); } /* free result set */ maxdb_free_result($result); } /* remove table */ maxdb_query($link, "DROP TABLE temp.mycity"); /* close connection */ maxdb_close($link); ?> The above example will output something similar to: 11111 (Georgetown,NY) 22222 (Hubbatown,CA) SEE ALSO
maxdb_prepare(3), maxdb_stmt_bind_param(3). PHP Documentation Group MAXDB_STMT_EXECUTE(3)
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