函数说明 1、split()函数 语法：str.split(str="",num=string.count(str))[n] 参数说明： str：...
SELECT id, regexp_split_to_table(my_string_array, ',') AS element FROM my_table; 结果: text id | element ---+--- 1 | 1 1 | 2 1 | 3 2 | 4 2 | 5 2 | 6 3 | 7 3 | 8 3 | 9 (9 rows) 4. 拆分后数据的处理建议 拆分数组后,你可以根据需要对数据进行进一步的处理,...
从postgres数组逗号分隔值转换为行和列但是，这不允许您重新指定列名。这将是相当棘手的。我建议您只需...
以下插入语句 join_data 字段使用 default 子句来设置默认值,而不是指定值: runoobdb=#INSERTINTOCOMPANY (ID,NAME,AGE,ADDRESS,SALARY,JOIN_DATE)VALUES(3,'Teddy',23,'Norway',20000.00,DEFAULT);INSERT01 插入多行 runoobdb=#INSERTINTOCOMPANY (ID,NAME,AGE,ADDRESS,SALARY,JOIN_DATE)VALUES(4,'Mark',25,...
(6rows) 列转行 imos=#createtemptabletest_column_to_rowasselectid, regexp_split_to_table(name_list,';')fromtest_split_to_table ;SELECT6imos=#select*fromtest_column_to_row ; id|regexp_split_to_table---+---1|a1|b1|c2|d2|e2|f (6rows) imos=#selectid, string...
从postgres数组逗号分隔值转换为行和列但是，这不允许您重新指定列名。这将是相当棘手的。我建议您只需...
INSERT INTO COMPANY1 (SELECT * FROM moved_rows 1. 2. 3. 4. 5. 6. 7. 11. HAVING 筛选分组后的各组数据 下面是 HAVING 子句在 SELECT 查询中的位置: SELECT FROM WHERE GROUP BY HAVING ORDER BY 1. 2. 3. 4. 5. 6. HAVING 子句必须放置于 GROUP BY 子句后面,ORDER BY 子句前面,下面是 ...
”DOCUMENT_DEBIT”was proceed first, however, the resulting dataset consisted of only 137. Perhaps, it would be better to filter rows from theDOCUMENTtable first, join them with the data from theDOCUMENT_DEBITtable and then calculate the aggregates. Let’s rewrite the query and create ...
psql: \watch min_rowsSeptember 12, 2023 • PostgreSQL PostgreSQL 17: part 1 or CommitFest 2023-07 We continue to follow the news in the world of PostgreSQL. The PostgreSQL 16 Release Candidate 1 was rolled out on August 31. If all is well, PostgreSQL 16 will officially release on Sep...
Multiple DDL statements might benefit from bunching into a single transaction rather than fired as individual statements, so the DDL lock only has to be taken once. This may not be desirable if the table-level locks interfere with normal operations. ...