Tag: INNER JOIN
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Post Views: 18 1. There was an implementation before, which is to judge a specific record, whether it meets a certain complex nesting condition, and the code is implemented as follows 2. Now you need to query all records that meet this complex nesting condition, refer to:https://learnku.com/docs/laravel/6.x/queries/5171#2f5914, the code is implemented as follows 3. The final generated SQL is in…
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Post Views: 19 1. Execute SQL as follows 2. Error: 1093 – you canT specific target tablexx_themesfor update in from clause. as shown in Figure 1 3. Reference:https://dev.mysql.com/doc/refman/5.7/en/update.html, in MySQL, you cannot modify the same table used in the Select section. You can connect the table to itself, which will cause MySQL to treat the table as two different things,…