The last few pages have been designed to convince you that if you are using the cost-based optimizer, you have to analyze your tables, indexes, and some of your columns. However, you don’t want to generate and maintain a script that goes out and analyzes every table, index, and column. The following SQL*Plus script takes as a parameter a username. It then generates another SQL script that will:

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SELECT 'ANALYZE TABLE '||owner||'.'||table_name||'
COMPUTE STATISTICS FOR TABLE;'
FROM dba_tables WHERE owner = '&1';

SELECT 'ANALYZE TABLE '||owner||'.'||table_name||'
COMPUTE STATISTICS FOR ALL INDEXES;'
FROM dba_tables WHERE owner = '&1';

Select 'ANALYZE TABLE '||owner||'.'||table_name||'
COMPUTE STATISTICS FOR COLUMNS '||column_name||' size 254;'
FROM dba_histograms
WHERE owner = '&1'
GROUP BY owner,table_name,column_name;

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@&1..sql