Elasticsearch 对比 sql
基本语法
过滤语句
term过滤
等价于sql =
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"term":{
"tablefield":"xxx"
}
}
}
select * from tablename where tablefield = "xxxx"
terms过滤
等价于sql in
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"terms":{
"tablefield":["xxx1","xxx2"]
}
}
}
select * from tablename where tablefield in ("xxx1","xxx2")
range过滤
等价于 >,<,<=,>=
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"range":{
"tablefield":{
"gte":1,
"le":2,
}
}
}
}
//gt:大于>
//gte:大于等于>=
//lt:小于<
//lte:小于等于<=
select * from tablename where tablefield <2 and tablefield>=1
exists过滤
等价于 is NOT NULL
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"exists":{
"field":"tablefield"
}
}
}
select * from tablename where tablefield is NOT NULL
missing过滤
等价于 is NULL
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"missing":{
"field":"tablefield"
}
}
}
select * from tablename where tablefield is NULL
bool过滤 （组合多个过滤语句）
must
等价于 and
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"bool":{
"must":[
语句1，
语句2
]
}
}
}
select * from tablename where 语句1 and 语句2
must_not
等价于 and
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"bool":{
"must_not":[
语句1，
语句2
]
}
}
}
select * from tablename where !语句1 and !语句2
should
等价于 or
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"bool":{
"shuld":[
语句1，
语句2
]
"minimum_should_match":1
}
}
}
minimum_should_match
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13466847 查看本文章
| 分数 | 备注 |
|---|---|
| 1 | 子句满足数量,若无must 与 filter时默认 需要满足 1个should |
| -1 | 需要满足 n-1 个should |
| 75% | 需要满足75%个should |
| -75% | 需要满足1-75%个should |
select * from tablename where 语句1 or 语句2
filter
等价于 and 与must区别是不参与es算分
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"bool":{
"filter":[
语句1，
语句2
]
}
}
}
select * from tablename where 语句1 and 语句2
查询语句
match_all 查询
等价全部扫描
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"match_all":{
}
}
}
select * from tablename
match查询
等价与sql like 以及 contains
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"match":{
"tablefield":"a"
}
}
}
SELECT * FROM table_name WHERE tablefield like '%a%'
SELECT * FROM table_name WHERE CONTAINS(tablefield,'a')
multi_match查询
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"multi_match":{
"query": "a",
"fields": ["tablefield1", "tablefield2"]
}
}
}
SELECT * FROM table_name WHERE tablefield1 like '%a%' or tablefield2 like '%a%'
SELECT * FROM table_name WHERE CONTAINS(tablefield1,'a') or CONTAINS(tablefield2,'a')
wildcards查询
等价与sql like
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"wildcards":{
"tablefield":"a?b*"
}
}
}
SELECT * FROM table_name WHERE tablefield like "a_b%"
regexp查询
等价与sql regexp
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"regexp": {
"tablefield": "W[0-9].+"
}
}
}
SELECT * FROM table_name WHERE tablefield REGEXP "W[0-9].+"
prefix查询
等价与sql like
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"query":{
"wildcards":{
"tablefield":"a"
}
}
}
SELECT * FROM table_name WHERE tablefield like "a%"
bool查询
等价与sql union 或者 or
http://xxx.xxx.xxx.xxx:9200/tablename/_search
{
"bool": {
"must": {
"match": {
"tablefield1": "a" }},
"must_not": {
"match": {
"tablefield2": "b" }},
"should": [
{
"match": {
"tablefield3": "c" }}
]
}
}
SELECT * FROM table_name WHERE tablefield1 = "a" and tablefield2 <> "b"
Union
SELECT * FROM table_name WHERE tablefield3 = "c"
SELECT * FROM table_name WHERE tablefield1 = "a" and tablefield2 <> "b" or tablefield3 = "c"