====== spell_required 表 ======
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Table used to add restrictions for learning spells from trainer. Player can't learn spell 'spell_id' till he learns 'req_spell', when he loses 'req_spell' 'spell_id' will be lost too. Table is used also for profession specialisations as specialisations require profession of certain rank to learn.

**表结构**
^Field^Type^Attributes^Key^Null^Default^Extra^Comment^
|[[#spell_id|spell_id]]|MEDIUMINT|SIGNED|PRI|NO|0| | |
|[[#req_spell|req_spell]]|MEDIUMINT|SIGNED|PRI|NO|0| | |


===== 字段说明 =====
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==== spell_id ====

Spell ID from [[Spell.dbc]], which require knowing `req_spell` to learn from trainer.

==== req_spell ====

Spell ID from Spell.dbc, which is required to be known before `spell_id` can be learned from trainer.