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Top Forums Shell Programming and Scripting sed or awk command to replace a string pattern with another string based on position of this string Post 302656051 by guruprasadpr on Thursday 14th of June 2012 07:40:42 AM
Old 06-14-2012
Hi


Code:
$ cat file
INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES
(1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10 13:00:00'),
(2,'dsfsd','2000-04-06 00:00:00','Updated','2011-02-10 13:00:00'),
(3,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10 13:00:00');
INSERT INTO `table2` (`id`, `action`, `date`, `lastModified`, `dynamics`) VALUES
(1,'Change','2011-05-05 00:00:00','2012-02-10 13:00:00',null),
(2,'dsfsd','2000-04-06 00:00:00','2011-02-10 13:00:00',null),
(3,'Change','2011-05-05 00:00:00','2012-02-10 13:00:00',123);

Output:

Code:
$ awk -F, '/INSERT/{for(i=1;i<=NF;i++){if ($i ~ /lastModified/){x=i;print;getline;break;}}}{y="0000-0000 00:00:00";sub(/[-0-9: ]+/,y,$x);}1'  OFS=, file
INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES
(1,'Change','2011-05-05 00:00:00','Account Updated','0000-0000 00:00:00'),
(2,'dsfsd','2000-04-06 00:00:00','Updated','0000-0000 00:00:00'),
(3,'Change','2011-05-05 00:00:00','Account Updated','0000-0000 00:00:00');
INSERT INTO `table2` (`id`, `action`, `date`, `lastModified`, `dynamics`) VALUES
(1,'Change','2011-05-05 00:00:00','0000-0000 00:00:00',null),
(2,'dsfsd','2000-04-06 00:00:00','0000-0000 00:00:00',null),
(3,'Change','2011-05-05 00:00:00','0000-0000 00:00:00',123);

Guru.
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INSERT(7)							   SQL Commands 							 INSERT(7)

NAME
INSERT - create new rows in a table SYNOPSIS
INSERT INTO table [ ( column [, ...] ) ] { DEFAULT VALUES | VALUES ( { expression | DEFAULT } [, ...] ) | SELECT query } INPUTS table The name (optionally schema-qualified) of an existing table. column The name of a column in table. DEFAULT VALUES All columns will be filled by null values or by values specified when the table was created using DEFAULT clauses. expression A valid expression or value to assign to column. DEFAULT This column will be filled in by the column DEFAULT clause, or NULL if a default is not available. query A valid query. Refer to the SELECT statement for a further description of valid arguments. OUTPUTS INSERT oid 1 Message returned if only one row was inserted. oid is the numeric OID of the inserted row. INSERT 0 # Message returned if more than one rows were inserted. # is the number of rows inserted. DESCRIPTION
INSERT allows one to insert new rows into a table. One can insert a single row at a time or several rows as a result of a query. The col- umns in the target list may be listed in any order. Each column not present in the target list will be inserted using a default value, either a declared DEFAULT value or NULL. PostgreSQL will reject the new column if a NULL is inserted into a column declared NOT NULL. If the expression for each column is not of the correct data type, automatic type coercion will be attempted. You must have insert privilege to a table in order to append to it, as well as select privilege on any table specified in a WHERE clause. USAGE
Insert a single row into table films: INSERT INTO films VALUES ('UA502','Bananas',105,'1971-07-13','Comedy',INTERVAL '82 minute'); In this second example the last column len is omitted and therefore it will have the default value of NULL: INSERT INTO films (code, title, did, date_prod, kind) VALUES ('T_601', 'Yojimbo', 106, DATE '1961-06-16', 'Drama'); In the third example, we use the DEFAULT values for the date columns rather than specifying an entry. INSERT INTO films VALUES ('UA502','Bananas',105,DEFAULT,'Comedy',INTERVAL '82 minute'); INSERT INTO films (code, title, did, date_prod, kind) VALUES ('T_601', 'Yojimbo', 106, DEFAULT, 'Drama'); Insert a single row into table distributors; note that only column name is specified, so the omitted column did will be assigned its default value: INSERT INTO distributors (name) VALUES ('British Lion'); Insert several rows into table films from table tmp: INSERT INTO films SELECT * FROM tmp; Insert into arrays (refer to the PostgreSQL User's Guide for further information about arrays): -- Create an empty 3x3 gameboard for noughts-and-crosses -- (all of these queries create the same board attribute) INSERT INTO tictactoe (game, board[1:3][1:3]) VALUES (1,'{{"","",""},{},{"",""}}'); INSERT INTO tictactoe (game, board[3][3]) VALUES (2,'{}'); INSERT INTO tictactoe (game, board) VALUES (3,'{{,,},{,,},{,,}}'); COMPATIBILITY
SQL92 INSERT is fully compatible with SQL92. Possible limitations in features of the query clause are documented for SELECT [select(7)]. SQL - Language Statements 2002-11-22 INSERT(7)
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