How to extract a portion of a string from a full string using unix.
For example:
Say source string is = "req92374923.log"
I want only the numeric portion of the string say "92374923" how to do that in Unix. (2 Replies)
I have awhole bunch of files and I want to edit stringA with stringB without changing the filename.
I have tried the following sed commands:
sed "s/stringA/stringB/g" *
This will print the correct results but does not actually save it with the new content of the file. when I do a cat on... (5 Replies)
hi,
I have a script which accept filename and process them, however, one of the file needs 'special' handling so I need to identify it, say the filename contains the word "STOCK" (i.e. NEWYORKSTOCKLIST20060627.txt), I want to check if the filename contains the word "STOCK", how can I do that?... (1 Reply)
Hi All
I have 3 files as listed below and highlighted in bold the portions of the filenames I need to extract:
TOS_TABIN218_20090323.200903231830
TOS_TABIN219_1_20090323.200903231830
TOS_TABIN219_2_20090323.200903231830
I tried
source_tabin_name=`echo $fname | sed 's/_.*//'`
but I... (6 Replies)
Hi Gurus,
Would like to seek some help on how to extract a portion of string from log's output as shown below.
Sample of raw data:
piece handle=/test123/disk_dump/test123/df0_cntrl_PCPFCI20120404_68498 tag=TAG20120404T180035 comment=NONE
piece... (13 Replies)
Hi,
Here is my question: suppose I have files like
1990_8xdaily_atmos.nc
1991_8xdaily_atmos.nc
1992_8xdaily_atmos.nc
1993_8xdaily_atmos.nc
1990_daily_atmos.nc
1991_daily_atmos.nc
1992_daily_atmos.nc
1993_daily_atmos.nc
1990_month_atmos.nc
1991_month_atmos.nc
1992_month_atmos.nc... (1 Reply)
Hi
I need to extract the string from file name
filename: FILENAME_STRUT_01032013_XXXXXXX.TXT
I want 01032013 from the above file name. number of characters may differ before the required string but underscores(-) are same number i.e. after second underscore.
Please advise on this.
... (2 Replies)
Hi
I would like to extract the first portion of filename from a list of files.
The filename pattern is of the form 123456789_TEXT_TEXT_TEXT_.csv. I want to extract just the numerical portion of this filename from the list of files and then output this into another text file.
K (6 Replies)
I want to extract the filename from a string.
This is how I have the rawdata ina file
/home/sid/ftp/testing/abc.txt
/home/sid/ftp/tested/testing/def.txt
/home/sid/sftp/date/misc/hij.txt
i want a script which would provide me an output like this
Directory ... (10 Replies)
Hi I have to extract the destination path information from each record the file is of variable length so I will not be able to use the print command.The search should start on variable "destinationPath" and it should end at immediate "," also the first field has to be printed
Input File:... (7 Replies)
Discussion started by: rkakitapalli
7 Replies
LEARN ABOUT MINIX
begin
BEGIN(7) SQL Commands 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
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 [commit(7)] or ROLLBACK [rollback(7)] is given. By default (without BEGIN), PostgreSQL executes transactions in ``autocom-
mit'' 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 ses-
sions will be unable to see the intermediate states wherein not all the related updates have been done.
If the isolation level or read/write mode is specified, the new transaction has those characteristics, as if SET TRANSACTION [set_transac-
tion(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 [commit(7)] or ROLLBACK [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 [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 ref-
erence page contains additional compatibility information.
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 [commit(7)], ROLLBACK [rollback(7)], START TRANSACTION [start_transaction(7)], SAVEPOINT [savepoint(7)]
SQL - Language Statements 2010-05-14 BEGIN(7)