I have this two tables, -- -- Table structure for table `t1` -- CREATE TABLE `t1` ( `pid` varchar(20) collate latin1_general_ci NOT NULL,
I had the below query working in mysql 4.1, but does not in 5.0: SELECT * FROM email e开发者_如何学运维, event_email ee
This question already has answers here: 开发者_如何学C LEFT JOIN vs. LEFT OUTER JOIN in SQL Server
I know this very silly, but can anybody hel开发者_StackOverflow社区p me in understanding what does this join query is doing in elabortive description?
I have two tables: 1.tableA is a list of records with many columns. There is a timestamp column called \"created\"
In a table, there is a column that contains ids separated by comas ex: \"159,167\" I want to do the equivalent of a join between this table and the table that contains those ids.
I have 2 tables A and B with the following columns Table A - id,bId,aName,aVal Table B - id,bName where A.bId is the same as B.id. I want a result set from a query to get
I\'m trying to write a bit of SQL for SQLITE that will take a subset from two tables (TableA and TableB) and then perform a LEFT JOIN.
I have this query in MySQL: SELECT pr.*, pr7.value AS `room_price_hi开发者_StackOverflow社区gh` FROM `jos_hp_properties` pr
I see people using LEFT JOIN in their mysql queries to fetch data from two tables. But I normally do it without left joi开发者_运维技巧n. Is there any differences besides the syntax, e.g. performance?
加载中,请稍侯......