In a .txt file i have a set of teradata queries which i need to execute and capture result for all queries.Is there any way to run teradata queries from a file?
:cool:
I need to execute a shell script to do the following:
cat a file
run two back ground processes using the first two values from the file
wait till those background processes finish
run two more background processes using the next two values from the file
wait till those background... (1 Reply)
Can anyone help..
I have a .dat file which contains 5 columns of data. I need to select one row containing just 3 of the columns. I'm not sure how to select a single row? I then need perform arithmetic on on two out of the three columns and display the output in a new column.
For example..
... (1 Reply)
Hi,
I new to Unix and scripting. Following is my requirement. Can someone tell me whether its possible or not. Also please let me know how to proceed further if this is possible.
List of queries are stored in a file. For example, I have to run a query like this:
Select * from &XYZ where... (0 Replies)
I am trying execute a sql file from the script and the sql file has the following code snippet, which throws out the error given below
FOR C_FINELINE_LP AS CURSOR C_SLS FOR
SELECT * FROM WM_UTIL.FLT_DEP
WHERE LOAD_IND = 'N'
DO
.....
.....
....
END FOR;
FOR C_FLTSLS_STR_LP AS... (0 Replies)
Hi,
I am new to UNIX shell scripting (KSH). I have a file in UNIX server which is delimited by |.
I require the basic syntax to:
read the file
move it to a local variables
load a database - Teradata
Continue until end of file.
Note: if the field is have no value inbetween two... (6 Replies)
How do i connect from C program to teradata Database?
The C program is being executed from a Unix script, AIX.
I am calling a C program from a Unix shell script and the C Program executes some SQLs on Teradata Database. (3 Replies)
Hello friends,
I need to insert data from a file to another. I need this to form an sql query file which will consist of 50.000 INSERT INTO sentences.
my sql query file will consist of 50.000 times the below line consecutively:
insert into subscriber... (6 Replies)
Hi Team,
I have around 30GB tar file in solaris box. I would like to transfer from solaris box to linux box.
Could you please advice on which one is best. I mean ftp,sftp,rsync,scp ?
Thanks,
Mani (7 Replies)
Hi All,
I have a file queries.txt as follows :
SELECT COLUMN1 FROM SCHEMA2.TABLE1 MINUS SELECT COLUMN1 FROM SCDEMA2.TABLE2;
SELECT COLUMN2 FROM SCHEMA2.TABLE1 MINUS SELECT COLUMN2 FROM SCDEMA2.TABLE2;
SELECT COLUMN3 FROM SCHEMA2.TABLE1 MINUS SELECT COLUMN3 FROM SCDEMA2.TABLE2;
SELECT... (2 Replies)
Hi,
I have a shell script containing multiple PSQL queries for which I want the output to be redirected to a text file.
psql -U postgres -d database -o textfile.txt << EOF
Query1;
Query2;
Query ....;
EOF
When executing the script, queries outputs are directed to textfile.txt, however... (2 Replies)
Discussion started by: nms
2 Replies
LEARN ABOUT REDHAT
prepare
PREPARE(7) SQL Commands PREPARE(7)NAME
PREPARE - create a prepared query
SYNOPSIS
PREPARE plan_name [ (datatype [, ...] ) ] AS query
INPUTS
plan_name
An arbitrary name given to this particular prepared query. It must be unique within a single session, and is used to execute or
remove a previously prepared query.
datatype
The data-type of a parameter to the prepared query. To refer to the parameters in the prepared query itself, use $1, $2, etc.
OUTPUTS
PREPARE
The query has been prepared successfully.
DESCRIPTION
PREPARE creates a prepared query. A prepared query is a server-side object that can be used to optimize performance. When the PREPARE
statement is executed, the specified query is parsed, rewritten, and planned. When a subsequent EXECUTE statement is issued, the prepared
query need only be executed. Thus, the parsing, rewriting, and planning stages are only performed once, instead of every time the query is
executed.
Prepared queries can take parameters: values that are substituted into the query when it is executed. To specify the parameters to a pre-
pared query, include a list of data-types with the PREPARE statement. In the query itself, you can refer to the parameters by position
using $1, $2, etc. When executing the query, specify the actual values for these parameters in the EXECUTE statement -- refer to EXECUTE
[execute(7)] for more information.
Prepared queries are stored locally (in the current backend), and only exist for the duration of the current database session. When the
client exits, the prepared query is forgotten, and so it must be re-created before being used again. This also means that a single prepared
query cannot be used by multiple simultaneous database clients; however, each client can create their own prepared query to use.
Prepared queries have the largest performance advantage when a single backend is being used to execute a large number of similar queries.
The performance difference will be particularly significant if the queries are complex to plan or rewrite. For example, if the query
involves a join of many tables or requires the application of several rules. If the query is relatively simple to plan and rewrite but rel-
atively expensive to execute, the performance advantage of prepared queries will be less noticeable.
NOTES
In some situations, the query plan produced by PostgreSQL for a prepared query may be inferior to the plan produced if the query were sub-
mitted and executed normally. This is because when the query is planned (and the optimizer attempts to determine the optimal query plan),
the actual values of any parameters specified in the query are unavailable. PostgreSQL collects statistics on the distribution of data in
the table, and can use constant values in a query to make guesses about the likely result of executing the query. Since this data is
unavailable when planning prepared queries with parameters, the chosen plan may be sub-optimal.
For more information on query planning and the statistics collected by PostgreSQL for query optimization purposes, see the ANALYZE [ana-
lyze(7)] documentation.
COMPATIBILITY
SQL92
SQL92 includes a PREPARE statement, but it is only for use in embedded SQL clients. The PREPARE statement implemented by PostgreSQL also
uses a somewhat different syntax.
SQL - Language Statements 2002-11-22 PREPARE(7)