函数说明 1、split()函数 语法：str.split(str="",num=string.count(str))[n] 参数说明： str：...
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...
imos=#createtabletest_split_to_table(idint, name_listvarchar);CREATETABLEimos=#insertintotest_split_to_tablevalues(1,'a;b;c'),(2,'d;e;f');INSERT02imos=# imos=#select*fromtest_split_to_table ; id|name_list---+---1|a;b;c2|d;e;f (2rows) imos=# imos=# imos=#selectid, r...
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...
(2 rows) MyTest=> SELECT B'11'::bit(3); bit --- 110 (1 row)4.6 数组4.6.1 数组类型声明1). 创建字段含有数组类型的表。 CREATE TABLE sal_emp ( name text, pay_by_quarter integer[] --还可以定义为integer[4]或integer ARRAY[4] ); 2). 插入数组数据: MyTest=# INSERT INTO sal_emp...
FROM regexp_split_to_table('john,smith,jones', ',') AS a; Which outputs: a --- john smith jones (3 rows) You can achieve the same result by using the construct: SELECT a FROM unnest(string_to_array('john,smith,jones', ',')) AS a; With short...
”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 ...
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 ...
Split string using a POSIX regular expression as the delimiter.REGEXP_SPLIT_TO_ARRAY ('ABC DEF', E'\\s+') = {ABC,DEF} REGEXP_SPLIT_TO_TABLE ('ABC DEF', E'\\s+') = 'ABC' 'DEF' (2 rows)Return true if the string matches the supplied pattern....
FROM regexp_split_to_table('john,smith,jones', ',') AS a; Which outputs: a --- john smith jones (3 rows) You can achieve the same result by using the construct: SELECT a FROM unnest(string_to_array('john,smith,jones', ',')) AS a; With short...