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关系型数据库 Postgresql 6.5.2

QUERY: SELECT 'trailing' AS first;
first   
--------
trailing
(1 row)

QUERY:  
SELECT /* embedded single line */ 'embedded' AS second;
second  
--------
embedded
(1 row)

QUERY: SELECT /* both embedded and trailing single line */ 'both' AS third;
third
-----
both 
(1 row)

QUERY:  
SELECT 'before multi-line' AS fourth;
fourth           
-----------------
before multi-line
(1 row)

QUERY: /* This is an example of SQL which should not execute:
 * select 'multi-line';
 */
SELECT 'after multi-line' AS fifth;
fifth           
----------------
after multi-line
(1 row)