I am very new to Unix. What are the similiarities and differences between ScoUnix and AIX5 if any? Where might i find the information? Which is better? (1 Reply)
i want to know the similarities and disimilarities of Unix and Windows file systems . methods of file , file orgsnization , meaning of file extension , file and disk fragments :confused::confused: (1 Reply)
Hello Everybody!!!!!!!!! Request you to help me with the below mentioned issue:
I have 2 files say,
File 1:
a|4|7
b|3|2
c|8|8
d|8|9
File 2:
a|4|6
b|2|2
c|8|8
d|9|8
The third file(output file) should have:
Data mismatch in row 1 column 3
Data mismatch in row 2 coumn 2
Data... (3 Replies)
Hello everyone!!!!! Need some help on inserting data in a file columnwise.
Example:
File1:
1|AAA|25|2
5|qqe|20|7
4|wer|31|81
I need to create a second file in which data can be inserted in a columnwise manner i.e.
File2:
AAA|25|1|2
qqe|20|5|7
wer|31|4|81
The order of columns in... (1 Reply)
Hello everyone!!!!! Need some help on inserting data in a file columnwise.
Example:
File1:
1|AAA|25|2
5|qqe|20|7
4|wer|31|81
I need to create a second file in which data can be inserted in a columnwise manner i.e.
File2:
AAA|25|1|2
qqe|20|5|7
wer|31|4|81
The order of columns in... (1 Reply)
Hi ,
I have a CSV file that has around 50K records in it. I have to delete all the duplicate rows from the file except one, depending upon data in column4.
Lets say there are 3 rows for 'column4data' in the file. I have to retain only that line which has the smallest date value in column2.... (3 Replies)
Hi All,
I want to trim each columns leading & trailing (like sql trim function) of a ',' separated file..
I've a file like this..
manab , c gi
lucky , home
babu , maa
I want the output as
manab,c gi
lucky,home
babu,maa
A one liner would be a great help. (2 Replies)
hi guys, i want help... Reding XML file and print the values into the text file using linux shell script file as per below xml file
<sequence>
<Filename>aldorzum.doc</Filename>
<DivisionCode>US</DivisionCode>
<ContentType>Template</ContentType>
<ProductCode>VIMZIM</ProductCode>
</sequence>... (4 Replies)
I have two files which has component name and version number separated by a space
cat file1
com.acc.invm:FNS_PROD 94.0.5
com.acc.invm:FNS_TEST_DCCC_Mangment 94.1.6
com.acc.invm:FNS_APIPlat_BDMap 100.0.9
com.acc.invm:SendEmail 29.6.113
com.acc.invm:SendSms 12.23.65
cat file2 ... (8 Replies)
Discussion started by: rakeshtomar82
8 Replies
LEARN ABOUT CENTOS
begin
BEGIN(7) PostgreSQL 9.2.7 Documentation BEGIN(7)NAME
BEGIN - start a transaction block
SYNOPSIS
BEGIN [ WORK | TRANSACTION ] [ transaction_mode [, ...] ]
where transaction_mode is one of:
ISOLATION LEVEL { SERIALIZABLE | REPEATABLE READ | READ COMMITTED | READ UNCOMMITTED }
READ WRITE | READ ONLY
[ NOT ] DEFERRABLE
DESCRIPTION
BEGIN initiates a transaction block, that is, all statements after a BEGIN command will be executed in a single transaction until an
explicit COMMIT(7) or ROLLBACK(7) is given. By default (without BEGIN), PostgreSQL executes transactions in "autocommit" mode, that is,
each statement is executed in its own transaction and a commit is implicitly performed at the end of the statement (if execution was
successful, otherwise a rollback is done).
Statements are executed more quickly in a transaction block, because transaction start/commit requires significant CPU and disk activity.
Execution of multiple statements inside a transaction is also useful to ensure consistency when making several related changes: other
sessions will be unable to see the intermediate states wherein not all the related updates have been done.
If the isolation level, read/write mode, or deferrable mode is specified, the new transaction has those characteristics, as if SET
TRANSACTION (SET_TRANSACTION(7)) was executed.
PARAMETERS
WORK, TRANSACTION
Optional key words. They have no effect.
Refer to SET TRANSACTION (SET_TRANSACTION(7)) for information on the meaning of the other parameters to this statement.
NOTES
START TRANSACTION (START_TRANSACTION(7)) has the same functionality as BEGIN.
Use COMMIT(7) or ROLLBACK(7) to terminate a transaction block.
Issuing BEGIN when already inside a transaction block will provoke a warning message. The state of the transaction is not affected. To nest
transactions within a transaction block, use savepoints (see SAVEPOINT(7)).
For reasons of backwards compatibility, the commas between successive transaction_modes can be omitted.
EXAMPLES
To begin a transaction block:
BEGIN;
COMPATIBILITY
BEGIN is a PostgreSQL language extension. It is equivalent to the SQL-standard command START TRANSACTION (START_TRANSACTION(7)), whose
reference page contains additional compatibility information.
The DEFERRABLE transaction_mode is a PostgreSQL language extension.
Incidentally, the BEGIN key word is used for a different purpose in embedded SQL. You are advised to be careful about the transaction
semantics when porting database applications.
SEE ALSO COMMIT(7), ROLLBACK(7), START TRANSACTION (START_TRANSACTION(7)), SAVEPOINT(7)PostgreSQL 9.2.7 2014-02-17 BEGIN(7)