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mysql µÄ sql ÐÔÄÜ·ÖÎöÆ÷Ö÷ÒªÓÃ;ÊÇÏÔʾ sql Ö´ÐеÄÕû¸ö¹ý³ÌÖи÷Ïî×ÊÔ´µÄʹÓÃÇé¿ö¡£·ÖÎöÆ÷¿ÉÒÔ¸üºÃµÄչʾ³ö²»Á¼ SQL µÄÐÔÄÜÎÊÌâËùÔÚ¡£ 
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Ê×ÏÈ£¬¿ªÆô MySQL SQL Profiler
mysql> SELECT @@profiling; 
+-------------+ 
| @@profiling | 
+-------------+ 
| 0 | 
+-------------+ 
1 row in set (0.00 sec) 
mysql> SET profiling = 1; 
Query OK, 0 rows affected (0.00 sec) 
mysql> SELECT @@profiling; 
+-------------+ 
| @@profiling | 
+-------------+ 
| 1 | 
+-------------+ 
1 row in set (0.00 sec) 
ĬÈÏÇé¿öÏ profiling µÄֵΪ 0 ±íʾ MySQL SQL Profiler ´¦ÓÚ OFF ״̬£¬¿ªÆô SQL ÐÔÄÜ·ÖÎöÆ÷ºó profiling µÄֵΪ 1. 
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mysql> create table t_engines select * from t_engines1; 
Query OK, 57344 rows affected (0.10 sec) 
Records: 57344 Duplicates: 0 Warnings: 0 
mysql> select count(*) from t_engines; 
+----------+ 
| count(*) | 
+----------+ 
| 57344 | 
+----------+ 
1 row in set (0.00 sec) 
mysql> select count(*) from t_engines; 
+----------+ 
| count(*) | 
+----------+ 
| 57344 | 
+----------+ 
1 row in set (0.00 sec) 
mysql> SHOW PROFILES; 
+----------+------------+-------------------------------------------------+ 
| Query_ID | Duration | Query | 
+----------+------------+-------------------------------------------------+ 
| 26 | 0.


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