Tài liệu SQL Statement Tuning pdf

... the session level: SQL& gt; ALTER SESSION SET 2 SQL_ TRACE = {True|False}; SQL& gt; EXECUTE dbms_session.set _sql_ trace 2 ({True|False}); SQL& gt; EXECUTE 2 dbms_system.set _sql_ trace_in_session ... Manager – Statspack – Explain plan – SQL Trace and TKPROF – Autotrace • To determine which SQL statements possibly require tuning • Not to tune the actual SQL statements 11-4 Co...

Ngày tải lên: 17/02/2014, 14:20

... purchase PDF Split-Merge on www.verypdf.com to remove this watermark. REVIEWING CODE AGAINST SQL INJECTION SPAGHETTI QUERY ANT IPATTERN reviewing code against SQL injection, 248–249 REVOKE statements, ... database, 275 TABLESAMPLE c lause, 189 team review against SQL injection, 248–249 technical debt, 266 325 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermar...

Ngày tải lên: 26/01/2014, 08:20

... sys.dm_exec_query_stats AS qs ON qs. [sql_ handle] = COALESCE( r. [sql_ handle], c.most_recent _sql_ handle) OUTER APPLY sys.dm_exec _sql_ text(COALESCE( r. [sql_ handle], c.most_recent _sql_ handle, qs. [sql_ handle])) AS ... view sys .sql_ expression_dependencies . This was also introduced in SQL Server 2008: http: //sqlblog.com/blogs/aaron_bertrand/archive/2008/09/09/keeping- sysde...

Ngày tải lên: 15/12/2013, 13:15

... Phần 2 SQL Advanced (bài 10) SQL ALTER TABLE Biểu thức ALTER TABLE dùng để thay đổi các giá trị trong tables.

Ngày tải lên: 24/12/2013, 10:18

... Phần 2 SQL Advanced (bài 12) SQL GROUP BY and HAVING Tập hợp functions (giống như lệnh SUM) thường cần thiết thêm vào hàm GROUP BY . GROUP BY được xem thêm vào SQL bởi vì tập ... GROUP BY column Ví dụ về GROUP BY : Đây là table "Sales" : Sử dụng câu lệnh SQL để xem những trường có trong table này : Trích: SELECT Company, SUM(Amount) FROM Sales Kết ......

Ngày tải lên: 24/12/2013, 10:18

... purchase PDF Split-Merge on www.verypdf.com to remove this watermark. This Page Intentionally Left Blank Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Please purchase PDF ... Author 327 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. This Page Intentionally Left Blank Please purchase PDF Split-Merge on www.verypdf.com to re...

Ngày tải lên: 21/01/2014, 08:20

... UNLOAD SELECT Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 3.26 ISQL OUTPUT The Interactive SQL utility (dbisql.exe, or ISQL) supports a statement that per - forms ... purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Note: ISQL commands like OUTPUT and INPUT can’t be nested inside BEGIN blocks. They can, however, be placed inside S...

Ngày tải lên: 21/01/2014, 09:20

... 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

... PROCEDURE RemoveQty (IN my_order_qty INTEGER) LANGUAGE SQL BEGIN IF my_order_qty > 0 THEN Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 288 PUZZLE 69 LIFO-FIFO ... purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 292 PUZZLE 70 STOCK TRENDS PUZZLE 70 STOCK TRENDS You are not supposed to put a calculated column in a table in a pur...

Ngày tải lên: 26/01/2014, 08:20