White spaces function trim

The actual query, often there are multiple tables, queries need to harmonize such segments or the total size of an index or primary key, and we get a lot of tables table name, SQL queries, each time you need to manually add double quotation marks, removing spaces a lot of trouble.

After you can delete unnecessary information through a text editor, column mode.

For example, the following table to obtain a large number of names, it is desirable to query these tables, the primary key constraint already exists, and is automatically named constraint information. 
SELECT
owner, constraint_name, constraint_type, table_name, Status from the DBA_CONSTRAINTS WHERE owner = ' EXX ' and constraint_type = ' P ' and constraint_name like ' the SYS% ' and table_name in (TRIM ( ' XX ' ) , TRIM ( ' XX ' ))

 

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Origin www.cnblogs.com/lvcha001/p/11386673.html