Getting Started with DB2 Express-C

100 Getting Started with DB2 Express-C
parameters are not supported. For example, the commands shown in Listing 5.1 below are
saved in a file called script1.db2.
CONNECT TO EXPRESS;
CREATE TABLE user1.mytable
( col1 INTEGER NOT NULL,
col2 VARCHAR(40),
col3 DECIMAL(9,2));
SELECT * FROM user1.mytable FETCH FIRST 10 ROWS ONLY;
COMMIT;
Listing 5.1 - A sample SQL Script stored in file script1.db2
In the above script, all the statements are SQL statements and each statement is
separated by a statement delimiter, in this case a semi-colon. The file name does not need
to use the extension “db2”. Any extension could be used.
5.9.1.1 Executing SQL Scripts
An SQL script can be executed from either the Command Editor or the DB2 Command
Window on Windows, or through a Linux shell. To run the script in Listing 5.1 from the DB2
Command Window or Linux shell, you can use the following command:
db2 -t -v -f script1.db2 -z script1.log
or the equivalent one:
db2 –tvf script1.db2 –z script1.log
In this command:
-t indicates that statements use the default statement termination character (a semicolon)
-v indicates verbose mode; causing db2 to echo the command being executed
-f indicates that the filename specified after this flag is the script file.
-z indicates that the filename specified after this flag is used for appending screen
output for later analysis (this is optional, but recommended)
When the -t flag is used and no line delimiter is specified, the semi-colon is assumed to be
the delimiter of the statements. There may be situations where another delimiter is
required. For example, a script containing SQL PL code needs to use a different statement
termination character other than the default (semicolon), because semicolons are used
within SQL PL object definitions to terminate procedural statements.
For example, in the script file functions.db2 shown in Listing 5.2 below, you see it
contains the statement to create a function, and a semi-colon is needed at the end of the
SELECT statement because it is part of the syntax required within the function. For the
CREATE FUNCTION statement terminator we are using an exclamation mark (!). If we had