具有相同ID但行名称不同的多行

Question

I have two tables with different number of columns and column name.

tab a:

ID   nome       cognome    messaggio  testo      orario     ip
---  ---------  ---------  ---------  ---------  ---------  ---------
1    a          a          a          a          a          127  
2    b          b          b          b          b          111
3    a          a          tt         qqq        h          127     

tab b:

id   nome       cognome    email
---  ---------  ---------  ---------
1    t          t          t

I would like to use %t% within both the tables and proper publisher all columns of both tables as I do?

print:

ID   nome       cognome    messaggio  testo      orario     ip         email
---  ---------  ---------  ---------  ---------  ---------  ---------  ---------
1    t          t          null       null       null       null       t
3    a          a          tt         qqq        h          127        null

Answer 1

You are in search of something like this:

    SELECT ID as id, nome, cognome, messaggio, testo, orario, ip, NULL AS email 
      FROM `tabA` 
     WHERE nome LIKE '%t%' OR cognome LIKE '%t%'  OR messaggio LIKE '%t%'  OR testo LIKE '%t%'

 UNION ALL

    SELECT id as id, nome, cognome, NULL as messaggio, NULL AS testo, NULL as orario, NULL AS ip, email 
      FROM `tabB` 
     WHERE nome LIKE '%t%' OR cognome LIKE '%t%'  OR email LIKE '%t%'

sqlFiddle demo

UNION is used to combine the result from multiple SELECT statements into a single result set. UNION remove duplicate rows, UNION ALL returns all rows. The column number of each SELECT statement must be equal, so I specified all fields in each SELECT , setting Null for non-existing columns.

Please note that above use of LIKE seriously affects performance.

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• Read more about UNION