dynamic-sql

问题 I need a stored procedure that takes any table name as a parameter and returns total count of rows and distinct count of values in each column of that particular table when executed. Let's take the sample table as below: create table journey ( Src varchar(255), Dest varchar(255) ) insert into journey values ('Jaipur', 'Mumbai'), ('Mumbai', 'Jaipur'), ('Kolkata', 'Bangalore'), ('Bangalore', 'Indore'),('Indore', 'Lucknow'), ('Lucknow', 'Indore') Can anybody help me with this task of dynamic SQL

问题 1.getting invalid identifier error while updating row_val variable char value 'Good' into the table 2.while inserting number it's working fine but strings its getting errors 3. declare count_temp number; csv_data varchar2(1000); val varchar2(100); row_val varchar2(100); sqlcmd varchar2(3000); col_name varchar2(100); col_data varchar2(100); begin csv_data:='good,son,r,,happy'; col_data:='varchar2(100)'; select regexp_count(csv_data, ',') + 1 into count_temp from dual; dbms_output.put_line

问题 1.getting invalid identifier error while updating row_val variable char value 'Good' into the table 2.while inserting number it's working fine but strings its getting errors 3. declare count_temp number; csv_data varchar2(1000); val varchar2(100); row_val varchar2(100); sqlcmd varchar2(3000); col_name varchar2(100); col_data varchar2(100); begin csv_data:='good,son,r,,happy'; col_data:='varchar2(100)'; select regexp_count(csv_data, ',') + 1 into count_temp from dual; dbms_output.put_line

问题 Is it possible to filter on column names themselves in psql? I want to generate a limited version of the original table (with several hundred columns) in a separate schema a la (pseudocode): create table why.am_i_doing_this select * from original.table where column_name_of_the_table not in ('column_1', 'column_2' ); 回答1: Build the DDL command dynamically. You can do it in two steps: Build statement: SELECT 'CREATE TABLE why.am_i_doing_this AS SELECT ' || string_agg(column_name, ', ' ORDER BY

问题 I am using dynamic SQL to Select from a group of tables where some of the table names contain the '&' character. However once my query hits one of these tables I get the following error: Incorrect syntax near '&'. Here is some example code that recreates the error I am getting: DECLARE @TABLE_NAME AS NVARCHAR(150); SET @TABLE_NAME = 'A&BTable'; EXEC( 'SELECT col1, col2, col3 FROM Warehouse_Repository.dbo.' + @TABLE_NAME ) How can I alter this query so that I can Select from table names

问题 I am using dynamic SQL to Select from a group of tables where some of the table names contain the '&' character. However once my query hits one of these tables I get the following error: Incorrect syntax near '&'. Here is some example code that recreates the error I am getting: DECLARE @TABLE_NAME AS NVARCHAR(150); SET @TABLE_NAME = 'A&BTable'; EXEC( 'SELECT col1, col2, col3 FROM Warehouse_Repository.dbo.' + @TABLE_NAME ) How can I alter this query so that I can Select from table names

问题 I have a SQL query (a store procedure ) that i want to convert to PLSQL I already conver most of the store procedure but i cant convert the following part : DECLARE lookupTableRow CURSOR FOR SELECT TableName FROM SYS_LookUpTable OPEN lookupTableRow FETCH NEXT FROM lookupTableRow INTO @tableName WHILE @@FETCH_STATUS=0 BEGIN SET @sql='SELECT * FROM '+@tableName EXECUTE sp_executesql @sql IF @counter=0 BEGIN INSERT INTO T_TABLE_MAPPING VALUES('P_MAIN_METADATA', 'Table', @tableName) END ELSE

问题 I have a SQL query (a store procedure ) that i want to convert to PLSQL I already conver most of the store procedure but i cant convert the following part : DECLARE lookupTableRow CURSOR FOR SELECT TableName FROM SYS_LookUpTable OPEN lookupTableRow FETCH NEXT FROM lookupTableRow INTO @tableName WHILE @@FETCH_STATUS=0 BEGIN SET @sql='SELECT * FROM '+@tableName EXECUTE sp_executesql @sql IF @counter=0 BEGIN INSERT INTO T_TABLE_MAPPING VALUES('P_MAIN_METADATA', 'Table', @tableName) END ELSE

问题 I have a SQL query (a store procedure ) that i want to convert to PLSQL I already conver most of the store procedure but i cant convert the following part : DECLARE lookupTableRow CURSOR FOR SELECT TableName FROM SYS_LookUpTable OPEN lookupTableRow FETCH NEXT FROM lookupTableRow INTO @tableName WHILE @@FETCH_STATUS=0 BEGIN SET @sql='SELECT * FROM '+@tableName EXECUTE sp_executesql @sql IF @counter=0 BEGIN INSERT INTO T_TABLE_MAPPING VALUES('P_MAIN_METADATA', 'Table', @tableName) END ELSE

问题 I have a rather complicated function in postgresql (Version 9.4.4) that I need a bit of help with. I have a loop (with lots of work below) declared like this inside of my function: CREATE OR REPLACE function getRSI( psymbol varchar, pstarttime timestamp with time zone, pendtime timestamp with time zone, pduration double precision, ptable varchar ) RETURNS SETOF rsi AS $BODY$ declare row_data record; -- some variables begin FOR row_data IN SELECT datetime, value FROM "4" WHERE symbol = 'AAPL'