I have q tricky question when joining 3 tables in Teradata DB.In the last line of my query , I am comparing one condition with C an B tables and its creating performance issue in returning the data . Basically I want to eliminate OR clause and try other approach.Is there any logic to satisfy this condition . Thanks in advance
Last edited by Scrutinizer; 12-09-2015 at 02:25 PM..
Reason: code tags
I am trying to transpose tables listed in the format into format. Any help would be greatly appreciated.
Input:
test_data_1
1 2 90%
4 3 91%
5 4 90%
6 5 90%
9 6 90%
test_data_2
3 5 92%
5 4 92%
7 3 93%
9 2 92%
1 1 92%
...
Output:... (7 Replies)
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)
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,
When i use the below code snippet in my shell script OFC_10.sh:
if
then
echo "Success"
exit 2
elif
then
echo "Failure"
exit 6
I get the error message:
./OFC_10.sh: line 41: '
./OFC_10.sh: line 45: '
Line 41 is the line where If loop starts and line 45 is... (2 Replies)
Hi,
I am trying to create a text file from data retrieved from a query.The data retrieved is having this character '^L' at regular intervals of the data.
How can i eliminate this, Please find below the sample data.
I tried sed -e "s/\^L//g" to convert it, but with no luck
^LCODE*SERIAL... (11 Replies)
Hi all,
I want to use a variable inside my sql query and below is my script:
#!/bin/ksh
export b="abcd"
a=`sqlplus -s abc/def@ghi <<++
set heading off;
set feedback off;
select xxx from mytable where clmn_nm='$b';
exit;
++`
echo $a
But the output i get is below:
$>... (4 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
can anyone please explain what the below code does?
i mean $fide_stopfile = ?
when $FIDE_SCR = '/fs/dir1/dir2/common/scr'
and also little confused with if clause too.
what it check?
$fide_stopfile = "$ENV{FIDE_SCR}/../tmp/STOP";
if ( -e $fide_stopfile > 0 ) {
... (3 Replies)
Hello All,
I want to do a conditional search for a directory, i.e
pathname=/abc/def
foldername=xyz
if ( $pathname/$foldername/aaa )
then
..................
fi
Here i am searching for aaa directory inside the path and if it exist then it should go inside the loop.
Can... (1 Reply)
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)
Discussion started by: rohit_shinez
9 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)