Обсуждение: SQL Query for Foreign constraint
Hi sir
Currently I am using following query on mysql :
* SHOW TABLES; ---> To get list of table in a particular db.
* SELECT TABLE_NAME, CONSTRAINT_NAME, COLUMN_NAME, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME from information_schema.key_column_usage WHERE constraint_schema ='myDBName';
---> to get foreign constraint information.
* SHOW INDEX FROM myTableName FROM myDBName;
I am required to get above information from postgres.
I didn't find postgres query corresponding to above mysql query to fetch corresponding information.
PS : help me for above query in postgres.
Best Regards.
Bhim
On 20/03/2014 07:48, Bhim Kumar wrote: > Hi sir > > Currently I am using following query on mysql : > > * SHOW TABLES; ---> To get list of table in a particular db. Assuming you're using psql, did you take the advice you're given on connection and type "help"? Anyway, to see a list of tables just enter: \d Lots of handy backslash commands are available - \? will tell you more, as will the fine manual: http://www.postgresql.org/docs/9.3/static/app-psql.html Ray. -- Raymond O'Donnell :: Galway :: Ireland rod@iol.ie
On 3/20/2014 4:45 PM, Raymond O'Donnell wrote: > On 20/03/2014 07:48, Bhim Kumar wrote: >> Hi sir >> >> Currently I am using following query on mysql : >> >> * SHOW TABLES; ---> To get list of table in a particular db. > > Assuming you're using psql, did you take the advice you're given on > connection and type "help"? > > Anyway, to see a list of tables just enter: > > \d > > Lots of handy backslash commands are available - \? will tell you more, > as will the fine manual: > > http://www.postgresql.org/docs/9.3/static/app-psql.html > > Ray. > > Yep, and if you are writing code, then all that info is in the information_schema. try: select * from information_schema.tables and select * from information_schema.columns etc. -Andy