Search Text in Fields in Every Table of a MySQL Database

Search text in fields in every table of a MySQL database

You can peek into the information_schema schema. It has a list of all tables and all fields that are in a table. You can then run queries using the information that you have gotten from this table.

The tables involved are SCHEMATA, TABLES and COLUMNS. There are foreign keys such that you can build up exactly how the tables are created in a schema.

mySQL query to search all tables within a database for a string?

If you want to do it purely in MySQL, without the help of any programming language, you could use this:

## Table for storing resultant output

CREATE TABLE `temp_details` (
 `t_schema` varchar(45) NOT NULL,
 `t_table` varchar(45) NOT NULL,
 `t_field` varchar(45) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;

## Procedure for search in all fields of all databases
DELIMITER $$
#Script to loop through all tables using Information_Schema
DROP PROCEDURE IF EXISTS get_table $$
CREATE PROCEDURE get_table(in_search varchar(50))
 READS SQL DATA
BEGIN
 DECLARE trunc_cmd VARCHAR(50);
 DECLARE search_string VARCHAR(250);

 DECLARE db,tbl,clmn CHAR(50);
 DECLARE done INT DEFAULT 0;
 DECLARE COUNTER INT;

 DECLARE table_cur CURSOR FOR
 SELECT concat('SELECT COUNT(*) INTO @CNT_VALUE FROM `',table_schema,'`.`',table_name,'` WHERE `', column_name,'` REGEXP ''',in_search,''';')
 ,table_schema,table_name,column_name
 FROM information_schema.COLUMNS
 WHERE TABLE_SCHEMA NOT IN ('information_schema','test','mysql');

 DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1;

 #Truncating table for refill the data for new search.
 PREPARE trunc_cmd FROM "TRUNCATE TABLE temp_details;";
 EXECUTE trunc_cmd ;

 OPEN table_cur;
 table_loop:LOOP
 FETCH table_cur INTO search_string,db,tbl,clmn;

 #Executing the search
 SET @search_string = search_string;
 SELECT search_string;
 PREPARE search_string FROM @search_string;
 EXECUTE search_string;


 SET COUNTER = @CNT_VALUE;
 SELECT COUNTER;

 IF COUNTER>0 THEN
 # Inserting required results from search to table
 INSERT INTO temp_details VALUES(db,tbl,clmn);
 END IF;

 IF done=1 THEN
 LEAVE table_loop;
 END IF;
 END LOOP;
 CLOSE table_cur;

 #Finally Show Results
 SELECT * FROM temp_details;
END $$
DELIMITER ;

Source: http://forge.mysql.com/tools/tool.php?id=232

Search for all occurrences of a string in a mysql database

A simple solution would be doing something like this:

mysqldump -u myuser --no-create-info --extended-insert=FALSE databasename | grep -i "<search string>"

MYSQL query for searching through ALL the fields?

It is not possible with one query.

However when you do:

DESCRIBE table_name;

you get the field names which you can generate the query from.

Search in all fields from every table of a MySQL database May be useful.

Search all fields in mySql

Try this..

concate fields to search whole table

Select * from tblproduct  where Concat(field1, '', field2, '', fieldn) like "%textbox%"

or

Using MATCH and AGAINST in mysql

SELECT * FROM tblproduct  WHERE MATCH (field1, field2, field3) AGAINST ('textbox')

Find and Replace text in the entire table using a MySQL query

For a single table update

 UPDATE `table_name`
 SET `field_name` = replace(same_field_name, 'unwanted_text', 'wanted_text')

From multiple tables-

If you want to edit from all tables, best way is to take the dump and then find/replace and upload it back.

way to search entire database for a string in MySQL

There is one solution, which might not be what you want. If you dumped the table into a file (mysqldump) with the data, then you would be able to grep any information you wanted out of it.

It would remove the need for time consuming search queries, and is the most efficient way I can think of.

Search a whole table in mySQL for a string

Try something like this:

SELECT * FROM clients WHERE CONCAT(field1, '', field2, '', fieldn) LIKE "%Mary%"

You may want to see SQL docs for additional information on string operators and regular expressions.

Edit: There may be some issues with NULL fields, so just in case you may want to use IFNULL(field_i, '') instead of just field_i

Case sensitivity: You can use case insensitive collation or something like this:

... WHERE LOWER(CONCAT(...)) LIKE LOWER("%Mary%")

Just search all field: I believe there is no way to make an SQL-query that will search through all field without explicitly declaring field to search in. The reason is there is a theory of relational databases and strict rules for manipulating relational data (something like relational algebra or codd algebra; these are what SQL is from), and theory doesn't allow things such as "just search all fields". Of course actual behaviour depends on vendor's concrete realisation. But in common case it is not possible. To make sure, check SELECT operator syntax (WHERE section, to be precise).

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