Bigquery : get the name of the table as column value

Question

I have a dataset that contains several tables that have suffixes in their name:

• table_src1_serie1
• table_src1_serie2
• table_src2_opt1
• table_src2_opt2
• table_src3_type1_v1
• table_src3_type2_v1
• table_src3_type2_v2

I know that i can use this type of queries in BQ:

select * from `project.dataset.table_*`

to get all the rows from theses different tables.

What i am trying to achieve is to have a column that will contain for instance the type of source (src1, src2, src3)

Answer 1

假设所有表的架构都相同-您可以在下方的选择列表中添加（适用于BigQuery Standard SQL）

SPLIT(_TABLE_SUFFIX, '_')[SAFE_OFFSET(0)] AS src