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SQL optimization-different execution plans from SQL (1) _ Mssql series tutorials

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Author: User
Tags mssql
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Source: CSDN Oracle Technology Forum


Problem: Myepoch Same proposal SQL Because of the retrieved value, different execution efficiency varies greatly.
Problem environment: Oracle 10g, tbnc_adminpowerscope table has B-tree index in adminaccount,
Total TBNC_ADMINPOWERSCOPE records: 33422 rows
Total TBNC_CMSARTICLE records: 40782 rows
Result: Solved, optimized SQL Execution time, all smaller 0.032 Seconds
[SQL 1 ]:
Select art. article_id, art. article_title,

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Related Keywords:
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