select number, text from test_table union select number, text from test_table_2. Как Вы видите, вывелось всего 5 строк, так как у нас первая строка в первом запросе и первая строка во втором запросе одинаковые, поэтому они объединились. Теперь давайте объединим через union all.
select a,b,null,null from table1 union select null,null,c,d from table2 union select null,null,null,null,e,f from table3.
Try to search 999999 9' union all select cast(0x393133353134353632312e39 as char) and '0'0 here.
Union select null, null, null, null, null, null, null from information_schema.tables.
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UNION ALL Syntax. The UNION operator selects only distinct values by default. To allow duplicate values, use UNION ALL: SELECT column_name(s) FROM table1 UNION ALL SELECT
SELECT header, txt FROM news UNION ALL SELECT name, pass FROM members This will combine results from both news table and members table and return all of them. Another Example: ' UNION SELECT 1, 'anotheruser', 'doesnt matter', 1--. UNION – Fixing Language Issues.
Each SELECT statement within the UNION ALL must have the same number of fields in the result sets with similar data types. What is the difference between UNION and UNION ALL?
You can mix UNION ALL and UNION DISTINCT in the same query. Mixed UNION types are treated such that a DISTINCT union overrides any ALL union to its left. A DISTINCT union can be produced explicitly by using UNION DISTINCT or implicitly by using UNION with no following DISTINCT or ALL...