Tài liệu SQL Clearly Explained- P1 ppt

... end. Chapter 1: Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. SQL Clearly Explained Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. ... Work Chapter 1: Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. SQL Clearly Explained Third Edition Jan L. Harrington Please purchase PDF Split-Merge on www.ve...

Ngày tải lên: 24/12/2013, 13:16

... procedures and triggers. (See Chapter 14.) e SQL standard has been updated three times since the appearance of SQL: 1999 in versions named SQL: 2003, SQL: 2006, and SQL: 2008. As well as eshing out the ... text les. SQL s XML features are introduced in Chapter 17. is book is based on the more recent versions of the SQL standard (SQL: 2003 through SQL: 2008). However, keep in...

Ngày tải lên: 24/12/2013, 13:16

... form.tax_year || form.customer_numb e || operator represents concatenation in most SQL imple- mentations. It instructs the SQL command processor to view the two columns as if they were one and to base ... the SQL- 92 syntax SELECT acct_first_name, acct_last_name, form.tax_year, form.form_ID FROM project JOIN form; Please purchase PDF Split-Merge on www.verypdf.com to remove this wa...

Ngày tải lên: 21/01/2014, 19:20

... will be reading about in this chapter are often referred to as SQL s OLAP (Online Analytical Processing) functions. e basic SQL set, or aggregate, functions (summarized in Table 7-1) compute ... unless you resort to the group making trick shown earlier. e more recent versions of the SQL stan- dard (from SQL: 2003 onward), however, include a new way to compute aggregate functions...

Ngày tải lên: 21/01/2014, 19:20

... one DBMS. Catalog creation is implementation dependent and therefore not part of the SQL standard. Prior to SQL- 92, clusters often represented database les, and the clustering of objects into ... long. ey are not case sen- sitive. (In fact, many SQL command processors convert names to all upper- or lowercase characters before submitting a SQL statement to a DBMS for processing.)...

Ngày tải lên: 21/01/2014, 19:20

... sql_ stuff WHERE seq_numb = 16; would extract the document from the row with the sequence number of 16, convert it to plain text (removing the tags) and display it on the screen. Because SQL ... test Note: You could store XML in a text column, tags and all. How- ever, when you use an XML column, SQL will check the XML to see that it is well-formed. e XMLSERIALIZE function is essent...

Ngày tải lên: 21/01/2014, 19:20

... embedded SQL statement EXEC SQL complete _SQL_ statement Execute a prepared dynamic SQL statement EXECUTE [ GLOBAL | LOCAL ] prepared_dynamic _SQL_ statement [ INTO { parameter, … } | { SQL DESCRIPTOR ... dynamic SQL statement 000 None 38 External routine exception 000 None 001 Containing SQL not permitted 002 Modifying SQL not permitted 003 Prohibited SQL statement attempt...

Ngày tải lên: 21/01/2014, 19:20

... are SQL program modules that are invoked by an application program using the SQL CALL command. Both triggers and stored procedures are stored as part of a database. Writing and Executing SQL ... Writing and Executing SQL Routines and Modulesx Note: Support for SQL programming varies considerably from one DBMS to another. is chapter presents what is documented in the SQL st...

Ngày tải lên: 21/01/2014, 19:20

... theSQL + “, “; theSQL = theSQL + “zip_postcode = “ + contents_of_zip_filed; } EXEC SQL EXECUTE IMMEDIATE :theSQL; If (strcmp (SQLCODE, “00000”) EXEC SQL COMMIT; else { EXEC SQL ROLLBACK; // ... (needsComma) theSQL = theSQL + “, “; the SQL = theSQL + “state_province = “ + contents_of_state_field; needsComma = true; } if (valid_contents_in_zip_field) { if (needsComma) theSQL =...

Ngày tải lên: 21/01/2014, 19:20

... embedded SQL statement EXEC SQL complete _SQL_ statement Execute a prepared dynamic SQL statement EXECUTE [ GLOBAL | LOCAL ] prepared_dynamic _SQL_ statement [ INTO { parameter, … } | { SQL DESCRIPTOR ... dynamic SQL statement 000 None 38 External routine exception 000 None 001 Containing SQL not permitted 002 Modifying SQL not permitted 003 Prohibited SQL statement attempt...

Ngày tải lên: 21/01/2014, 19:20