1 Attach the power cord to the mini compressor and plug it into an outlet. 2  Connect the gun holster to the mini compressor. 3  Connect the short hose to the mini compressor. 4  Connect the other end of the short hose into the filter. 5  Attach the filter to one end of the long hose.
The SQL CHECK CONSTRAINT ensures that a value for a specific column or columns have satisfied a specified condition. The job of CHECK constraint is, to limit the values for a column of a table.1  The SQL CHECK CONSTRAINT can not be used on a VIEW. 2  The SQL CHECK CONSTRAINT can not be used in a subquery.onstraints can be specified when the table created first with CREATE TABLE statement or at the time of modification of structure of an existing table with ALTER TABLE statement. The SQL CONSTRAINTS are used to implement the rules of the table.
When you open a cursor variable with the OPEN FOR statement, PL/SQL evaluates any variables in the query and uses those values when identifying the result set. Changing the values of the variables later does not change the result set.f you process a query result set by looping through it and running another query for each row, then you can improve performance by removing the second query from inside the loop and making it a subquery of the first query. For more information about subqueries, see Oracle Database SQL Language Reference.