I have several tables in MySQL database and those tables are already filled;
Is there any way to get DML, which fills tables with same name, with exact same data?
for ex. if I have table (names) like this:
name_id : 1
name_val : john
name_id : 2
name_val : jack
I want to get this kind of DML :
Insert into table names(name_id,name_val) values(1,'john');
Insert into table names(name_id,name_val) values(2,'jackn');
You can utilize mysqldump
To get only data use --no-create-info parameter
mysqldump -u user -p[password] --no-create-info --compact db_name table_name > dump.sql
Related
I want to copy a table's schema as well as the data within that table to another database table in another database on a live server. How could I do this?
If you want to copy a table from one Database to another database , You can simply do as below.
CREATE TABLE db2.table LIKE db1.table;
INSERT INTO db2.table SELECT * FROM db1.table;
or just CREATE TABLE db2.table SELECT * FROM db1.table in MySQL 5
In BASH you can do:
mysqldump database_1 table | mysql database_2
CREATE TABLE db2.table_new AS SELECT * FROM db1.table_old
If you just want Structure to be copied simply use
CREATE TABLE Db_Name.table1 LIKE DbName.table2;
Ps > that will not copy schema and data
simply use -
CREATE TABLE DB2.newtablename SELECT * FROM DB1.existingtablename;
In Commandline:
mysqldump -h localhost -u username -ppassword [SCHEMA] --tables [TABLE] | mysql -h otherhost -u username -ppassword [SCHEMA2]
This will copy table inside SCHEMA on localhost to SCHEMA2 on otherhost.
localhost and otherhost are just hostname and might be same or different.
In MySQL how to copy data from one table to another in the same database table?
I know insert into select, but it is taking forever to do this, especially on a live database, we can't take a risk.
Some conditions are there:
1. table1 is a source table and table1_archives is a destination table.
2. table1_archives already have data so we can only append.
My attempt:
time mysqldump --log-error=$logfile --complete-insert --insert-ignore
--no-create-info --skip-triggers --user=$dbuser --host=$host $dbname table1
--where="created < now()-interval 10 month" > $filename
But it has the name of table1, so I can't insert it into table1_archives.
Any guidance will be appreciated.
Thanks in advance.
In your output file, you need to change the table name table1 to table1_archives. Unfortunately mysqldump does not have any way to do this. You will have to do this on the fly using sed, which will rename everything in output file from table1 to table1_archives.
Since your columns can also contain the content like table1, its better to search and replace by enclosing them in backticks.
You can also use gzip to compress the output file.
Here is the command that worked for me
mysqldump -u USER -h HOST -p --skip-add-drop-table --no-create-info --skip-triggers --compact DB table1 |\
sed -e 's/`table1`/`table1_archives`/' | gzip > filename.sql.gz
"but it is taking forever to do this"
There is a small trick to avoid this and then insert into will work faster:
Insert into table1 select * from table2
Trick:
step-1: drop all indices from table2
step-2: execute query
step-3: create indices again
So I would like to copy some records from one table to another. But the trick is that the another table is in a different HOST. I will try to explain by giving you a mysql query pseudo code.
Another_host = "192.168.X.X";
INSERT INTO database_original.table_1( id, name, surname)
SELECT id, name, surname
FROM Another_host.database_another.table_2
WHERE Another_host.database_another.table_2.id > 1000;
I would probably have to declare the user for the "Another_host" somewhere.
This is what I am trying to do..is this even possible like I imagine it?
Thx
There is one workaround solution which will do the same what you want.
Step 1:
Take dump of select query
mysql -e "select * from myTable" -h <<firsthost>> -u myuser -pxxxxxxxx mydatabase > mydumpfile.sql
Step 2: Restore the dump
mysql -h <<secondhost>> -u myuser -pxxxxxxxx < mydumpfile.sql
Background
We currently dump our database basically like this:
mysqldump --complete-insert --opt --hex-blob --all-databases -u -p
The dump will look something like this:
USE `DB1`
-- Table structure for table `MYTABLE`
DROP TABLE IF EXISTS `MYTABLE`
CREATE TABLE `MYTABLE`
...
INSERT INTO `MYTABLE` ...
-- Table structure for table `NEXTABLE`
...
USE `DB2`
-- Table structure for table `MYTABLE`
DROP TABLE IF EXISTS `MYTABLE`
CREATE TABLE `MYTABLE`
...
INSERT INTO `MYTABLE` ...
-- Table structure for table `NEXTABLE`
Problem
in some recovery scenarios we need to pull a specific table out of the backup. We might do something like this:
cat backup | sed -n -e '/Table structure for table .MYTABLE.$/,/Table structure for table .NEXTABLE.$/p' | mysql -u -p DB2
Because the individual table statements do not qualify the dbspace then in this case the table information for DB1.MYTABLE is going to be extract and thus DB2 is going to be populated with the backup from DB1
Question
Is there a way to get the backup to qualify the dbspace name on each table statement such that the USE statement becomes unnecessary for this scenario? E.g.
USE `DB2`
-- Table structure for table `DB2`.`MYTABLE`
DROP TABLE IF EXISTS `DB2`.`MYTABLE`
CREATE TABLE `DB2`.`MYTABLE`
...
INSERT INTO `DB2`.`MYTABLE` ...
-- Table structure for table `DB2`.`NEXTABLE`
With no answer and seemingly no way to add the space name to the dump I am forced to scan the dump differently. Also note that this is a recovery scenario so we cannot simply change the way we already dumped the database as it is too late at that point.
Since the table name within a space is unique what I ended up going with was to first isolate the dbspace instructions in the dump and then isolate that table.
Use this to restore the table from dump.sql to the same space it came from:
sed -n '/^USE .SPACENAMEHERE.;$/,/^USE .*$/p' dump.sql | sed -E -n '/^(USE .*;|-- Table structure for table .TABLENAMEHERE.)$/,/^-- Table structure for table /p' | mysql -u -p
You will substitute the SPACENAMEHERE with the dbspace name and TABLENAMEHERE with the table name. Because this usage of sed will include the USE statement in the output we do not need to qualify which database to connect to on the mysql command line. As long as the user has permissions to "USE" that space it will work. But if you want to insert this into a different dbspace (i.e. temporary) then you will use this.
Use this to restore the table from dump.sql to a different space (e.g. a temporary one):
sed -n '/^USE .SPACENAMEHERE.;$/,/^USE .*$/p' dump.sql | sed -E -n '/^-- Table structure for table .TABLENAMEHERE.$/,/^-- Table structure for table /p' | mysql -u -p DESTINATIONSPACE
I have two databases. I want to dump data from one table in 1st database and insert to another table with an another name in 2nd database.
So I have DB1 that has tables tbl1 and tabl2, and DB2 that has tables tbl3 and tbl4. I know that tabl1 and tabl3 have the same structure. How to copy data from one to another by using mysqldump command?
I've tried to do this, but it's not work.
mysqldump --user root --password=password --no-create-info DB1 tbl1 > c:/dump.sql
mysql --user root --password=password DB2 tbl3 < c:/dump.sql
This is not going to work due to different table name
if both database are sitting in the same server using the same daemon, you can directly
insert into DB2.tbl3 select * from DB1.tbl1;
if tbl1 is not existing in DB2,
pseudo code for this :
# import as tbl1 from DB1 into tbl1 in DB2
mysqldump DB1 tbl1 | mysql DB2
# then rename tbl1 in DB2 to tbl3
mysql DB2 -N <<< "rename table tbl1 to tbl3"
I am using in a linux shell command line
mysqldump --user=username --password=xxxx dbname | mysql --host=remotehost.com --user=username --password=xxxx -C dname
this transfers it from the local host to a remote host, the whole database.
IF you want to also copy the contents of the table you can do:
CREATE TABLE `new_table_name` LIKE `old_table_name`;
INSERT INTO `new_table_name` SELECT * FROM `old_table_name`;
If you have to copy table from one database to another database then use following
CREATE TABLE `db1.new_table_name` LIKE `db2.old_table_name`;
INSERT INTO `db1.new_table_name` SELECT * FROM `db2.old_table_name`;
It works for me as dumping single table and importing was throwing syntax error with MariaDB