hi,
pls could you help me with one program in KSH ( i have sunOS).
I need to create an If clause, that prints an error message and filenames, when in a directory are found some files of null size (find . -type f -size 0 ).
thanks (3 Replies)
I've got following script that I thought would only email me when the if clause finds the grep. But it emails me anyway (with an empty file) even if the grep doesn't return anything.
What should the line be?
if
then grep -l 'unique constraint' $LOGDIR/archive_active* >... (3 Replies)
Hi,
I have an app which user can query the database based on 4 criteria, that is Field1, Field2, Field3 and Field4
Mya I know how to write a dynamic SQL where I can choose to retrieve data based on their selected value.
eg. where Field1=AAA
eg. where Field1=AAA and Field2=BBB
eg.... (1 Reply)
Hi,
I need to know how to extract entire WHERE clause from a SQL statement using UNIX command.
For example:
If following is the SQL then how to extract entire WHERE clause:
UPDATE <TABLE_NAME_1> SET <FIELD_NAME> = VALUE WHERE CONDITION_1 AND CONDITION_2 = (SELECT FIELD_NAME FROM... (15 Replies)
for example, I have a text file in random content inside, maybe something like this.
234234
54654
123134
467456
24234234
7867867
23424
568567if I run this command
cat "filename.txt" | sort -n | grep "^467456$" -A 1 -B 1the result is
234234
467456
568567is it possible to do this command... (2 Replies)
HI friends ,
I am very new to perl .please dont mind if i ask silly questions.
I seee below code in one sript
if ( exists $ENV{FMTWRP_TMP_DIR} and $ENV{FMTWRP_TMP_DIR} ) {
$tdir = $ENV{FMTWRP_TMP_DIR};
}
whats does this mean .
I am very confused about the if clauses in... (1 Reply)
Hi, This is my first post.
I have a korn shell script which outputs a select statment to a file. There is only one column and one row which contains a record count of the select statement.
The select statement looks something like this:
SELECT COUNT(some_field) AS "count_value"
... (2 Replies)
Hi,
i need to add a condition in my IF clause where i need to check if the file exists in a folder and return true out of it. but in my directory i have multiple files with same name but datestamp append on it for e.g.
export f1 = filename
export f2=filename1
if ]
then
echo "No... (9 Replies)
Hi,
I have a file pk.txt which has table related data in following format
TableName | PK
Employee | id
Contact|name,phone,country
I have another file desc.txt which lists datatype of each field like this:
Table|Field|Type
Employee|id|int
Contact|name|string
Contact|country|string... (7 Replies)
Linux Gods,
I am simply attempting to parse SQL statements from a PDF doc in creating a base SQL script at a later time but for the life of me, am having a tough time extracting this data.This exact string worked perfectly a couple of months ago and now it doesnt. Below is an example of the data... (4 Replies)
Discussion started by: metallica1973
4 Replies
LEARN ABOUT REDHAT
delete
DELETE(7) SQL Commands DELETE(7)NAME
DELETE - delete rows of a table
SYNOPSIS
DELETE FROM [ ONLY ] table [ WHERE condition ]
INPUTS
table The name (optionally schema-qualified) of an existing table.
condition
This is an SQL selection query which returns the rows which are to be deleted.
Refer to the SELECT statement for further description of the WHERE clause.
OUTPUTS
DELETE count
Message returned if items are successfully deleted. The count is the number of rows deleted.
If count is 0, no rows were deleted.
DESCRIPTION
DELETE removes rows which satisfy the WHERE clause from the specified table.
If the condition (WHERE clause) is absent, the effect is to delete all rows in the table. The result is a valid, but empty table.
Tip: TRUNCATE [truncate(7)] is a PostgreSQL extension which provides a faster mechanism to remove all rows from a table.
By default DELETE will delete tuples in the table specified and all its sub-tables. If you wish to only update the specific table men-
tioned, you should use the ONLY clause.
You must have write access to the table in order to modify it, as well as read access to any table whose values are read in the condition.
USAGE
Remove all films but musicals:
DELETE FROM films WHERE kind <> 'Musical';
SELECT * FROM films;
code | title | did | date_prod | kind | len
-------+---------------------------+-----+------------+---------+-------
UA501 | West Side Story | 105 | 1961-01-03 | Musical | 02:32
TC901 | The King and I | 109 | 1956-08-11 | Musical | 02:13
WD101 | Bed Knobs and Broomsticks | 111 | | Musical | 01:57
(3 rows)
Clear the table films:
DELETE FROM films;
SELECT * FROM films;
code | title | did | date_prod | kind | len
------+-------+-----+-----------+------+-----
(0 rows)
COMPATIBILITY
SQL92
SQL92 allows a positioned DELETE statement:
DELETE FROM table WHERE
CURRENT OF cursor
where cursor identifies an open cursor. Interactive cursors in PostgreSQL are read-only.
SQL - Language Statements 2002-11-22 DELETE(7)