Thorsten Kettner

Thorsten Kettner has asked 2 questions and find answers to 111 problems.

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Thorsten Kettner questions

Insert into a query

Thorsten Kettner answers

PostgreSQL - consecutive day with min/max - tables contains multiple equal days
MYSQL GROUP_CONCAT with ORDER BY strange sorting results
Optimizing MySQL Query Performance for 'ARCHIVED' Status Selection
Please help me optimize this MySQL SELECT statement
SQL select with multiple conditions on the same table
How do I decide on what key to join the tables
Unique constraint on multiple columns - allow for single null
Grouping Timestamps based on the interval between them
MySql 5.7 ORDER BY clause is not in GROUP BY clause and contains nonaggregated column
Sysdate in oracle virtual column