Een left join doen met oude stijl joins

Combineer geen expliciete en impliciete JOINs. Gebruik eigenlijk geen impliciete JOINs.

Hier is de vraag die u wilt:

SELECT
    *
FROM
    table1
    INNER JOIN table2 alias1 ON table1.id_table3 = alias1.id_table3 
    INNER JOIN table2 alias2 ON table1.id_table4 = alias2.id_table4
    INNER JOIN table3 ON table1.id_table3 = table3.id_table3
    INNER JOIN table4 ON table1.id_table4 = table4.id_table4
    INNER JOIN table5 ON table1.id_table5 = table5.id_table5
    INNER JOIN table6 table6alias ON alias1.id_svw_uebertragungsweg = table6alias.id_svw
    LEFT JOIN table2 alias3 ON table1.table1_id_table3_sender = alias3.id_table3
WHERE
    table1.id_table3 != 0
    AND ( table1.id_usr = 0 OR table1.id_usr IS NULL )