我有这些表:
条目表
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| id | blog_id | title |
---------------------------------
| 1 | 1 | 1st Entry |
---------------------------------
博客表
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| id | name |
-----------------
| 1 | 1stBlog |
-----------------
字段组表
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| id | blog_id | name |
-------------------------
| 1 | 1 | Group1 |
-------------------------
字段表
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| id | field_group_id | name |
---------------------------------
| 1 | 1 | field_1 |
---------------------------------
值表
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| id | field_id | entry_id | value …