PGSQL database to realize the import and export

pgsql database import and export

1. Export table

pg_dump -h database ip -U username database name -t table name >path, for example:

pg_dump -h 127.0.0.1 -U sysdba data_center -t book >/data/book.sql

2. Import table

psql -U username -d database name

psql -U sysdba -d data_center 

3. Export database

pg_dump -h database ip -U username database name>Path, for example:

pg_dump -h 127.0.0.1 -U sysdba data_center >/data/data_center.sql

4. Import database

psql -U username database name

psql -U sysdba data_center 

5. Compression

When the exported data is very large, you should use the xz compression command, which generates a file with a suffix of .xz, for example:

xz data_center.sql

The data_center.sql.xz file will be generated at this time

6. Import the compressed file into the database

xzcat compressed file path | psql -h database ip -U username database name, for example:

xzcat /data/data_center.sql.xz | psql -h 127.0.0.1 -U sysdba data_center

7. pgsql restores files in the database (import dmp files)

pg_restore -h ip -U username -d database name -v file path, for example:

pg_restore -h 127.0.0.1 -U sysdba -d sjls -v /usr/postgres.dmp

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