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Why does mysql stop using indexes when date ranges are added to the query?

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#mysql #indexing #query-optimization #query-performance #sql-execution-plan
108
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SQL Server - Substitute for OR when JOINing on non-indexed field

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#sql-server #join #query-performance
501
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Faster selects on large table with shredded/flattened xml field

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#sql-server #xml #select #query-performance
124
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Lot of full table scans (around 600) because of a simple IN statement

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#sql-server #t-sql #common-table-expression #query-performance
124
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Scaling MySQL database, increasing performance to many connections

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#mysql #linux #performance #database-performance #query-performance
1.2k
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Taxi Driver Queue management MySQL query

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#mysql #sql #database #query-performance
7.1k
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Clear MySQL Cache

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#mysql #query-performance
128
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Improve performance of a sql query

Published on
#sql #sql-server-2008-r2 #query-performance
2.9k
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query optimization for max function in oracle

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#oracle #query-optimization #query-performance
173
Views

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Published on
#sql #sql-server #query-performance #sql-server-2016
98
Views

I would like to generate a SQL script for stored procedure performance monitoring

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#sql-server #stored-procedures #query-performance #performance-monitor
883
Views

SQL Server choosing inefficient execution plan

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#sql #sql-server #query-optimization #sql-execution-plan #query-performance
1.2k
Views

How to force MySQL "Using index for group-by"

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#mysql #group-by #database-performance #query-performance #sqlperformance
47
Views

Query planner not using filter to limit calculations in high-cost join

Published on
#sql #postgresql #query-performance
294
Views

Performance tuning for SQL Query

Published on
#sql-server #t-sql #query-performance
362
Views

my mySQL query takes too much time (about 12 seconds) - any suggestions

Published on
#mysql #aggregate-functions #query-performance #correlated-subquery
212
Views

How can I make this sql query faster?

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#mysql #sql #query-performance
179
Views

SQL Server query - not performing as expected, not behaving like I thought it would

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#sql-server #performance #query-performance
2.1k
Views

PostgreSQL join fetch all rows in table, too slow

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#postgresql #inner-join #query-performance #postgresql-performance
45
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How to optimize mysql query using index?

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#mysql #indexing #query-optimization #query-performance

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