sql - MySql SUM() function -


Is it possible to use the MySql SUM () function inside another MySql SUM () function ??

Table 1, like Table 1 below. Table = 2 = Select Table (Table 1. Column 1 + SUM (Table 2. Column 2 + Table 2. Column 3)) Table 1 Insert Table 1.id = Table2.table1_id where Table 1 Column 2 = 'Test' ";

Thanks

Just need a SUM ()) : 

  SELECT SUM (Table 1. Column 1 + Table 2. Column 2 + Table 2. Column 3) ..

or use SUM () on each field: 

  SELECT SUM (Table1.Column1) + SUM ( Table 2. Column 2) + SUM (Table2.Column3) ...

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