... Versions: nginx version: nginx/1.15.8 linux kernel: 4.9.2 Does anyone have an idea of where to look for this issue? Or have you see anything like it before ...
will this select the first matched record from the top? SELECT * WHERE `position_id`="00000000" LIMIT 1; Thanks in advance.
Is there something wrong in my query?
How would I combine those two select statements into one nice select statement? Would it work if I complicated the SQL like below (because my own SQL statement contains an exists statement)?
Does anyone know if there is any speed difference (obviously for tables that are sizable enough) between these two queries: … or: … I should note that the primary_key field is actually a primary key.
SELECT * FROM table LIMIT 0, 1 SELECT * FROM table LIMIT 1.
MySQL supports the LIMIT clause to select a limited number of records, while Oracle uses ROWNUM. SQL Server / MS Access Syntax
The question should be clear enough, but is it of any advantage to use instead of SELECT 1 FROM table ... SELECT 1 FROM table ... LIMIT 1?
SQL> select 1 2 from (select '0' as r from dual 3 union 4 select '1' as r from dual 5 )
The list of select_expr terms comprises the select list that indicates which columns to retrieve.
The LIMIT clause makes it easy to code multi page results or pagination with SQL, and is very useful on large tables. Returning a large number of records can impact on performance. Assume we wish to select all records from 1 - 30 (inclusive) from a table...