this is only valid for MySQL,

PostgreSQL has IF [NOT] EXISTS for many objects; also for TABLE:

$ psql
psql (9.2.4)
Type "help" for help.
# CREATE TABLE IF NOT EXISTS my_table (foo INT, bar VARCHAR (25) );
CREATE TABLE
# \d my_table 
          Table "public.my_table"
 Column |         Type          | Modifiers 
--------+-----------------------+-----------
 foo    | integer               | 
 bar    | character varying(25) |

[download]

( So there is also: DROP <object> IF EXISTS ... ;

# drop table if exists my_table; -- exists
DROP TABLE
# drop table if exists my_table; -- no table is no problem:
DROP TABLE
#

[download]

)

Of course postgres can also ROLLBACK on DDL statements. Not many DBMS's implement *that*, I think.

In reply to Re^2: if table exists (DBI) by erix
in thread if table exists (DBI) by Bishma

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