6、SQL拼接 SqlStr text;--声明变量 _Condition text;--声明变量 SqlStr:='SELECT aa ';SqlStr:=SqlStr||',0.00 as CardTotal,0.00 as AppTotal FROMpublic.md_CashDeposit WHERE ' || _Condition || ';';returnQUERYexecuteSqlStr;--返回类型为结果集时 ...
Input/Output \copy ... perform SQL COPY with data stream to the client host \echo [STRING] write string to standard output \i FILE execute commands from file \ir FILE as \i, but relative to location of current script \o [FILE] send all query results to file or |pipe \qecho [STRIN...
return query execute 是 return query 的变形,它指定 sql 将被动态执行; returnqueryselectroad_number,sum(frequency)fromheat_mapgroupbyroad_number;--这样可以sql :='select road_number, sum(frequency) from heat_map group by road_number';returnquery sql;--这样不行 参考资料: https://blog.csdn.net...
# 创建游标对象cur=conn.cursor()# 查询表的元数据信息cur.execute("SELECT column_name, data_type, character_maximum_length, is_nullable FROM information_schema.columns WHERE table_schema = 'public'")# 获取查询结果rows=cur.fetchall() 1. 2. 3. 4. 5. 6. 7. 8. 上述代码中的 SQL 查询语句...
‘batch’ - Uses psycopg2.extras.execute_batch so that multiple copies of a SQL query, each one corresponding to a parameter set passed to executemany(), are joined into a single SQL string separated by a semicolon. This is the same behavior as was provided by the use_batch_mode=True fl...
EXECUTE format( 'SELECT COUNT(*) FROM zcdbfz01.%I WHERE %I LIKE %L', table_name, column_name, '%HOME-YYQK-PJZJ%' ) INTO result_count; -- 如果该表的该列包含特定的字符串,则输出表名和列名 IF result_count > 0 THEN RAISE NOTICE 'Table % contains the string "HOME-YYQK-PJZJ" in...
as newtable ('||rowc||' varchar,'||columnlist||')';stmt=E' select array_to_json(array_agg(row_to_json(t))) from ('||dynsql2||') t ';executestmtintoresult;returnresult;end$$ 测试用表结构和数据 -- toy example to show how it works...
问Postgres - SQL状态: 22004 in EXECUTE functionEN– 把before for each row的触发器删掉, 再测试...
public string image { get; set; } 装进参数中: postParams["image"] = new {name = "test"}; _db.Insertable(postParams).AS("test").ExecuteCommand();报错: Can't write CLR type <>f__AnonymousType13`1[System.String] with handler type TextHandler 如果是: postParams[attr.key] = Json...
executesqlinto out;returnout;返回多行多列 也有多种方式 1. 使用 return next 和 setof record ，需要 for 循环 CREATEORREPLACEFUNCTIONfuncname ( in_idinteger)RETURNSSETOF RECORDas $$DECLARE v_rec RECORD; BEGINforv_recin( (selectid , namefromtest_...